Congestión (pulmones)

7-Keto-DHEA is used by athletes for its thermogenic and body-composition effects, which underpin endurance and stamina. Clinical trials show it increases resting metabolic rate and reduces body fat when combined with exercise, supporting a leaner, more metabolically active physique. Its prohibition by WADA reflects regulatory recognition of its potential performance-relevant effects. Evidence for direct endurance gains is indirect, derived primarily from metabolic and body composition endpoints.

Acetyl-L-Carnitine (ALCAR) is a more bioavailable acetylated form of L-carnitine that supports mitochondrial energy production and is used for both physical endurance and cognitive stamina. It facilitates fatty acid transport for oxidation, supports acetyl-CoA availability in the TCA cycle, and has been shown in clinical studies to improve energy metabolism, reduce fatigue, and support physical performance particularly in older adults.

Alpha-ketoglutarate (AKG) is a key TCA cycle intermediate and glutamine precursor that supports cellular energy production and nitrogen metabolism during physical exercise. It has been studied as an ergogenic aid, particularly in combination with amino acids, showing improvements in exercise performance and muscle recovery. It reduces ammonia accumulation, which contributes to fatigue during prolonged exercise.

Alpha-lipoic acid (ALA) is a universal mitochondrial antioxidant and cofactor in mitochondrial energy metabolism (pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase complexes). Multiple studies show it reduces exercise-induced oxidative stress, improves insulin-mediated glucose uptake in muscle, and supports endurance by preserving mitochondrial function. It has been studied for fatigue reduction and energy metabolism.

Clinical evidence shows D-ribose (60 g/day) significantly extended exercise duration to ischemia in CAD patients and improved exercise tolerance in ischemic heart disease patients in a 6-month RCT. In healthy athletes, results are mixed, with one study reporting increased power output at 20 g/day but others showing no significant effect.

Muscle glycogen, replenished by dietary carbohydrates including amylopectin-type starches, is a primary fuel for endurance exercise; its depletion is well-established to impair endurance capacity. High-GI carbohydrates such as amylopectin are recommended for rapid glycogen resynthesis between endurance bouts. Evidence from physiology reviews and controlled carbohydrate manipulation studies in athletes documents the link between carbohydrate quality, glycogen availability, and endurance performance.

AAKG is widely used as a pre-workout supplement, with the arginine moiety intended to enhance NO-mediated oxygen delivery to muscles. The 8-week Campbell et al. RCT found AAKG improved Wingate peak power in resistance-trained men, and the AKG narrative review confirms AKG supplementation can enhance endurance and reduce fatigue.

Ashwagandha (Withania somnifera) has been evaluated in 13+ RCTs and multiple systematic reviews demonstrating improvements in VO2max, cardiorespiratory endurance, muscle strength, and fatigue reduction in healthy individuals and athletes. A 2021 Bayesian meta-analysis and a 2025 overview of 11 systematic reviews confirmed endurance and stamina benefits. Traditionally used in Ayurvedic medicine as a rasayana (rejuvenating tonic).

Astaxanthin is a powerful carotenoid antioxidant that has been studied in multiple RCTs for physical endurance. It reduces exercise-induced oxidative stress and muscle damage, improves fat oxidation during exercise, and has been shown to improve cycling time trial performance and increase time to exhaustion in human studies. Typically studied at 4–20 mg/day.

Astragalus membranaceus has been shown to enhance endurance in mice and is studied as an ergogenic and anti-fatigue agent. APS restores mitochondrial morphology and function after excessive exercise by correcting fusion-fission imbalance and restoring PGC-1α expression. A published reference notes astragalus can increase aerobic performance in runners.

Oral adenosine 5'-triphosphate disodium has been studied in double-blind RCTs demonstrating improvements in muscular endurance, power, and recovery via enhanced blood flow and purinergic vasodilation. A standard dose of 400 mg/day for 12 weeks has shown significant gains in strength, power output, and reduced fatigue in resistance-trained athletes.

Animal studies with W. coagulans BC99 showed significantly increased exercise endurance, reduced fatigue biomarkers, elevated glycogen stores, and improved antioxidant enzyme levels in protein-supplemented fatigued mice. Human pilot data suggests maintained peak power output following exhaustive exercise when B. coagulans is combined with protein supplementation.

Beetroot and beetroot juice are rich in inorganic nitrate, which is converted to nitric oxide in the body, reducing the oxygen cost of exercise and improving endurance performance. A 2017 systematic review of 23 articles confirmed improvements in cardiorespiratory endurance across trained athletes, and beetroot is listed among the top five IOC-recognized ergogenic aids for endurance. Effective dose is approximately 300–600 mg nitrate per serving.

Beta-alanine is one of the best-documented ergogenic aids for physical endurance, recognized by the IOC. It elevates intramuscular carnosine, buffering acid during high-intensity exercise and delaying fatigue. Multiple meta-analyses confirm improvements in time to exhaustion and muscular endurance at daily doses of 4–6.4 g. A 2025 systematic review confirmed it improves time to exhaustion in female athletes.

Betaine (trimethylglycine) has been studied in multiple RCTs as an ergogenic aid for physical performance. Meta-analyses confirm improvements in muscle endurance, power output, and body composition. It functions as a methyl donor supporting creatine synthesis, homocysteine metabolism, and cellular hydration. Typical effective dose is 2.5 g/day for 6–15 days.

Sodium bicarbonate is a well-studied ergogenic aid for high-intensity exercise. An umbrella review of meta-analyses concluded it acutely enhances peak anaerobic power, anaerobic capacity, endurance in events lasting ~45 seconds to 8 minutes, muscle endurance, 2000-m rowing, and high-intensity intermittent running. The standard pre-exercise dose is 0.3 g/kg body mass taken 60–120 minutes before exercise.

Bovine heart provides L-carnitine, CoQ10, taurine, and heme iron — four nutrients linked to physical endurance via distinct mechanisms including mitochondrial fat oxidation, ATP production, anti-fatigue effects, and oxygen delivery. Clinical trials of the constituent nutrients at pharmacological doses show performance and endurance benefits.

Bovine liver's heme iron and B12 content directly support hemoglobin synthesis and red blood cell production, the primary determinants of aerobic endurance capacity. CoQ10 content supports mitochondrial electron transport. Iron deficiency is a well-established cause of impaired VO2max and exercise tolerance.

Caffeine is one of the most extensively researched and IOC-recognized ergogenic aids, shown across dozens of RCTs and meta-analyses to improve endurance, reduce perceived exertion, and delay fatigue. It acts centrally via adenosine receptor antagonism and peripherally on muscle metabolism. Effective doses are typically 3–6 mg/kg body weight taken ~60 min before exercise.

Catechins enhance endurance through sustained fat oxidation during exercise, reduced exercise-induced oxidative stress, and maintained muscle contractile properties. Animal and some human data support catechins improving endurance capacity and delaying fatigue onset, especially with long-term supplementation.

The 2020 Gao and Chilibeck meta-analysis of 10 RCTs found tart cherry concentrate significantly improved endurance exercise performance, with proposed mechanisms including anti-inflammatory effects, reduced oxidative stress, and enhanced blood flow. Effects were strongest in trained endurance athletes.

Human RCTs demonstrate chlorella supplementation increases VO2max and reduces blood lactate during submaximal exercise, both markers of improved aerobic endurance. A 4-week RCT showed a 4.3 mL/kg/min increase in VO2max vs 0.2 in placebo.

CLA has been studied for effects on aerobic endurance. A 14-day crossover trial in student athletes showed CLA significantly increased exercise time to exhaustion and reduced perceived exertion. A comprehensive review supports dose-dependent endurance benefits when CLA is combined with physical activity, though evidence remains limited.

Collagen supplementation has been studied for physical endurance and stamina via its role in supporting connective tissue integrity (tendons, ligaments, cartilage) that underlies sustained physical activity. Specific hydrolyzed collagen formulations combined with vitamin C have been shown in RCTs to enhance collagen synthesis in tendons and support injury prevention and recovery in endurance athletes.

Multiple RCTs show bovine colostrum improves sprint performance, lean body mass, and blood buffer capacity in athletes. IGF-1 elevation is a proposed mechanism for enhanced muscle adaptation and recovery. A meta-analysis and several individual trials support meaningful ergogenic effects, though effect sizes vary.

CoQ10 (ubiquinone/ubiquinol) is essential for mitochondrial electron transport chain function and ATP synthesis, making it directly relevant to physical endurance. A 2022 PMC review of combined CoQ10 supplementation trials found favorable outcomes on physical performance parameters. It has been identified as an IOC-relevant supplement for endurance athletes, and RCTs have shown it supports exercise tolerance and reduces exercise-induced oxidative stress.

Cordyceps (C. sinensis and C. militaris) has been used in Traditional Chinese Medicine for centuries as an anti-fatigue tonic. A 2025 systematic review and meta-analysis of 14 RCTs (n=528 athletes) found it significantly improved endurance performance (p=0.05), ventilatory threshold (p=0.03), and VO2peak (p=0.04). Active compounds cordycepin and adenosine support mitochondrial ATP production and aerobic metabolism.

Creatine is an IOC-recognized ergogenic aid that elevates skeletal muscle phosphocreatine, enhancing ATP resynthesis for high-intensity efforts. A 2023 systematic review and meta-analysis confirmed it improves endurance performance in trained populations, particularly in sprint-intensive endurance events and repeated bouts. Benefits for steady-state aerobic endurance are more modest, but co-ingestion with carbohydrates enhances glycogen storage.

Creatine monohydrate is the most studied and bioavailable form of creatine, confirmed by a 2023 meta-analysis to improve endurance performance in trained athletes. It increases muscle phosphocreatine stores to support ATP resynthesis during high-intensity exercise bouts within endurance events. Typical dosing is 3–5 g/day following an optional loading phase.

D-Ribose is a naturally occurring pentose carbohydrate that is a structural building block for ATP. Research shows it accelerates ATP resynthesis following high-intensity exercise by up to 6-fold and improves exercise tolerance. Studies have shown significant improvements in energy, fatigue, and overall well-being in patients with energy metabolism disorders.

Ecdysterone (20-hydroxyecdysone) is the most studied phytoecdysteroid for physical performance. A 2019 double-blind RCT found it significantly improved muscle mass and strength in resistance-trained men. It activates estrogen receptor beta and mTOR signaling to enhance protein synthesis, supporting both muscle endurance and stamina. WADA monitored it for potential performance-enhancing classification.

EGCG is the primary bioactive catechin in green tea that activates AMPK, promotes mitochondrial biogenesis, and enhances fat oxidation during exercise—effects that spare glycogen and improve endurance capacity. Multiple human studies show EGCG supplementation improves aerobic performance, reduces exercise-induced oxidative stress, and supports endurance adaptations when combined with training.

Eleuthero (Eleutherococcus senticosus), also called Siberian ginseng, is considered to have among the strongest evidence for endurance enhancement among adaptogens. An 8-week RCT demonstrated improved endurance capacity and metabolism in humans. It has a long history in Russian and Chinese traditional medicine for combating fatigue and increasing physical work capacity.

Eucommia is documented with anti-fatigue and stamina-enhancing properties in published pharmacological reviews. Its metabolic effects—increasing skeletal muscle utilization of ketone bodies/glucose, enhancing mitochondrial function, and reducing inflammatory cytokines—provide a mechanistic basis for improved endurance. Preclinical anti-fatigue studies support this.

Eurycoma longifolia (Tongkat Ali) is a traditionally used Southeast Asian herb for physical stamina that has been studied in double-blind RCTs showing improvements in muscular strength, endurance, and reduced fatigue via testosterone-supporting and cortisol-reducing mechanisms. Active compounds include eurycomanone and eurypeptides.

Fenugreek (Trigonella foenum-graecum) has been used in traditional Ayurvedic and Middle Eastern medicine for physical strength and stamina. Multiple RCTs show fenugreek seed extracts improve muscular endurance, strength, and exercise performance through mechanisms involving testosterone optimization and anabolic signaling. It is among the herbs with strongest evidence for testosterone support in athletes per systematic reviews.

Panax ginseng is the most-studied herb for human physical performance, with controlled studies showing improved exercise endurance when using standardized root extracts (>8 weeks, >1 g/day) in older subjects. A 2020 double-blind RCT found 200 mg extract significantly increased endurance, lowered heart rate, and reduced perceived exertion in endurance athletes. A 2025 systematic review and meta-analysis further confirmed its role in exercise endurance.

Ginsenosides are the bioactive steroidal saponins in Panax ginseng responsible for its endurance and anti-fatigue effects. They activate AMPK pathways, reduce oxidative stress, and modulate energy metabolism. Multiple human and animal studies link ginsenoside-rich extracts to improved exercise performance and reduced fatigue markers.

Human RCT evidence shows GPC supplementation can improve time-trial power output and delay neuromuscular fatigue in endurance athletes, primarily by preventing exercise-induced choline depletion and supporting ACh-mediated neuromuscular function. Results are strongest for power-based endurance metrics.

Green tea and its primary bioactive EGCG (epigallocatechin gallate) have been studied for endurance performance. Green tea extracts improve fat oxidation during exercise, spare muscle glycogen, reduce exercise-induced oxidative stress, and may modestly improve aerobic performance. Multiple human studies support endurance-relevant effects of green tea catechins combined with exercise training.

Guarana (Paullinia cupana) is a natural caffeine-containing plant from the Amazon traditionally used by indigenous peoples for stamina and endurance. It contains 2–4.5% caffeine along with theobromine and theophylline, providing a more sustained stimulant effect than coffee. Multiple studies confirm its ergogenic effects are primarily attributable to caffeine content, improving endurance, reducing fatigue, and enhancing physical performance.

HMB (beta-hydroxy beta-methylbutyrate) is a leucine metabolite that reduces exercise-induced muscle protein breakdown and supports muscle mass maintenance during endurance training. A 10-week double-blind RCT in elite rowers combined HMB with creatine and found performance improvements. Multiple meta-analyses confirm HMB reduces muscle damage markers and supports lean mass in trained athletes.

A human crossover RCT showed that 500 mg HCA post-exercise approximately doubled the rate of muscle glycogen resynthesis in exercised skeletal muscle compared to placebo. HCA also shifted post-exercise energy metabolism toward fat oxidation. This supports a plausible role in endurance recovery, though in-exercise performance data are limited.

Iron is essential for hemoglobin and myoglobin synthesis, oxygen transport, and mitochondrial electron transport, all of which are fundamental to physical endurance. Iron deficiency, even without anemia, impairs aerobic performance and endurance capacity. Correction of iron deficiency in athletes improves VO2max and endurance performance, and iron is recognized by the IOC and leading sport nutrition bodies as a critical nutrient for endurance athletes.

BCAAs including isoleucine serve as oxidizable fuel substrates during prolonged exercise, supporting endurance by contributing to energy metabolism and attenuating central fatigue. A 2025 PMC systematic review found significant endurance-related outcomes in BCAA studies. Isoleucine's specific role in insulin-independent glucose uptake by muscle also contributes to sustained energy provision.

During sustained or intense exercise, L-alanine release from skeletal muscle increases as the glucose-alanine cycle is activated to maintain blood glucose and remove ammonia. Human studies confirm elevated circulating alanine with exercise and the cycle's role in prolonging glucose availability to working muscle. This biochemical function directly supports endurance capacity.

L-Alanyl-L-Glutamine has been studied specifically for endurance performance, particularly under conditions of dehydration stress. An RCT in 10 males showed AG at 0.2 g/kg improved time to exhaustion and performance markers during cycling at 75% VO2 max under hypohydration. A basketball RCT in NCAA athletes showed AG ingestion during play better preserved jump power, reaction time, and shooting accuracy versus water alone.

L-arginine is a semi-essential amino acid and the primary substrate for nitric oxide synthesis, promoting vasodilation and improved blood flow during exercise. Multiple RCTs have examined its effects on physical endurance with mixed results; benefits are more consistent in older or cardiovascular-compromised populations than in healthy young athletes. Typical doses studied are 3–9 g/day.

L-carnitine plays an essential role in fatty acid transport into mitochondria for energy production and has been confirmed in a 2021 systematic review and meta-analysis of 30 studies to improve body strength, sports endurance, and exercise capacity while delaying fatigue onset. It increases blood flow and oxygen supply to muscle tissue in athletes and reduces markers of muscle damage.

L-Citrulline is a non-essential amino acid that serves as a more effective precursor to arginine and nitric oxide than L-arginine itself, promoting vasodilation and improved oxygen/nutrient delivery during exercise. While a 2023 meta-analysis found no significant overall benefit for endurance performance, multiple individual RCTs show benefits for muscular endurance and reduced fatigue at doses of 6–8 g/day.

BCAA supplementation including isoleucine has been studied in human endurance exercise contexts, with evidence for improvements in substrate utilization and reductions in post-exercise fatigue. BCAAs may attenuate central fatigue by competing with tryptophan for brain uptake, and serve as oxidative fuel during prolonged efforts. Functional performance gains are modest and context-dependent.

Leucine oxidation increases during endurance exercise and serves as an energy substrate in working muscle, with BCOAD activity rising during the transition from rest to exercise. Leucine-enriched protein co-ingested after endurance exercise accentuates myofibrillar protein fractional synthetic rate, supporting recovery and adaptation. Disruption of BCAA metabolism severely impairs endurance capacity in animal models.

L-ornithine has been shown in human crossover RCTs to improve ammonia buffering during sustained endurance exercise, reducing the build-up of a central fatigue agent. The Sugino et al. 2008 study found L-ornithine attenuated fatigue and performance decline during 3.5-hour cycling. In an EJCN study with 14 trained adults, L-ornithine increased ammonia buffering capacity during and after exhaustive incremental ergometry.

L-Valine contributes to endurance by serving as an oxidizable energy substrate during prolonged exercise when glycogen stores are depleted, and by competing with tryptophan at the blood-brain barrier to attenuate central fatigue. Human trials with BCAA preparations show improved perceived exertion and sustained performance in endurance and intermittent sprint contexts.

Multiple RCTs demonstrate that L. plantarum strains TWK10 and PL-02 improve time-to-exhaustion, VO2max, and intermittent recovery test performance in both recreational and older adults. Glycogen optimization and microbiota-energy axis are key mechanisms.

A double-blind RCT demonstrated that oligomerized lychee fruit extract (OLFE) significantly increased submaximal running time in regularly exercising men compared to placebo. A flavanol-rich lychee fruit extract (FRLFE) also showed reduction of exercise-induced inflammatory markers in young long-distance runners in a separate clinical trial. These findings suggest lychee polyphenols can meaningfully support endurance capacity.

Maca (Lepidium meyenii) has been used as a traditional Andean stamina and endurance food for centuries. A 2024 systematic review and meta-analysis confirmed anti-fatigue effects and improvements in physical performance in both animal and human studies, including removal of metabolic waste products (blood lactate, blood urea nitrogen) after exercise. Active compounds include macamides and macaenes.

Magnesium is a cofactor in over 300 enzymatic reactions including ATP synthesis, muscle contraction, and oxygen delivery, making it essential for physical endurance. Deficiency impairs performance and increases fatigability. Supplementation in deficient athletes improves VO2max, strength, and endurance outcomes. Magnesium is recognized by IOC and sport nutrition bodies as a priority micronutrient for endurance athletes.

A 2022 systematic review of RCTs and crossover trials concluded that MCT oil supplementation showed very little to no ergogenic effect on endurance performance or substrate utilization in healthy athletes, with most studies finding no significant change in fat oxidation, lactate, VO2max, or time-trial performance. MCTs do increase ketone availability but the body cannot utilize MCT-derived ketones as a primary energy source during acute endurance exercise.

Multiple human RCTs support NMN's role in improving endurance. The Liao et al. 2021 RCT found significant improvements in VO2 peak and muscle oxygen utilization in runners. The Yi et al. 2022 multicenter RCT showed NMN at ≥600 mg/day significantly increased 6-minute walking distance in middle-aged adults.

Omega-3 fatty acids (EPA and DHA) support physical endurance by reducing exercise-induced inflammation, improving oxygen kinetics, enhancing mitochondrial efficiency, and supporting red blood cell membrane fluidity. Multiple RCTs and meta-analyses confirm reductions in muscle soreness and improved endurance recovery. They are recognized by the IOC as foundational support for endurance athletes.

Phosphate's role in 2,3-DPG synthesis mechanistically supports oxygen delivery during endurance exercise. Phosphate loading trials in cyclists and runners show variable improvements in VO2peak and time-trial performance. The evidence base is moderate with inconsistent clinical outcomes.

Phytoecdysteroids are plant steroids (notably ecdysterone/20-hydroxyecdysone) found in Rhaponticum, Cyanotis, and spinach that have been studied for anabolic and endurance-enhancing effects. A 2019 double-blind RCT found ecdysterone supplementation significantly increased muscle mass and one-rep maximum in resistance-trained men. They are proposed to act via estrogen receptor beta to stimulate protein synthesis.

Clinical RDP trials show Pycnogenol (pine bark extract) increases endurance time in recreational athletes and improves physical performance in standardized fitness tests. Four RDP trials on sports performance were included in a 2024 systematic review confirming this indication. Mechanisms include NO-mediated vasodilation and antioxidant protection.

Four separate RDP trials confirm Pycnogenol enhances sport endurance and performance. An RDP crossover study showed significantly increased endurance run time at 85% VO2 max after 30 days of 200 mg/day. Triathlete and recreational athlete data show improved times and sustained energy output. Improved microvascular oxygen delivery is the mechanistic basis.

Potassium homeostasis is tightly coupled to exercise capacity, with interstitial K+ accumulation in working muscle a primary contributor to peripheral fatigue during sustained exercise. Adequate potassium status is necessary to maintain membrane excitability and delay fatigue onset. Exercise physiology research has established these dynamics in human subjects.

Propionyl-L-Carnitine (PLCAR) is a form of carnitine with particular evidence for improving exercise tolerance and physical endurance, especially in individuals with peripheral vascular disease and heart failure. RCTs show it improves walking distance, peak oxygen consumption, and time to exhaustion during exercise. It is recognized alongside L-carnitine as a key ergogenic nutrient for exercise capacity.

Rhodiola rosea is a well-studied adaptogen with multiple RCTs and a 2025 systematic review/meta-analysis demonstrating improvements in endurance performance, time to fatigue, and reduced exercise-induced oxidative stress and muscle damage markers. Its key bioactives, salidroside and rosavins, support energy metabolism and oxygen utilization. It has long been used in Tibetan, Russian, and Scandinavian traditional medicine for fatigue and physical resilience.

Robusta coffee's caffeine is established as a leading ergogenic aid for endurance sports, improving time-to-exhaustion and time-trial performance by blocking adenosine-mediated fatigue. A double-blind crossover RCT showed caffeinated coffee at 5 mg/kg improved cycling time-trial performance ~5% versus placebo. A separate RCT demonstrated coffee also enhances post-exercise muscle glycogen resynthesis in endurance athletes, supporting recovery and repeated performance.

Siberian hunters used schisandra for centuries to enhance stamina. Soviet clinical research from the 1960s documented anti-fatigue and endurance-enhancing effects, leading to official adaptogen status in the USSR. PubMed review (PMID 19500070) documents 'good scientific evidence' for increased endurance in fatigued patients. A small MSKCC-cited RCT in older adults found schisandra extract enhanced skeletal muscle strength.

Schisandrins are the primary bioactive lignans in Schisandra chinensis (five-flavor berry), used traditionally in Chinese and Russian medicine to improve physical work capacity, reduce fatigue, and support stamina. Scientific evidence shows schisandrins enhance mitochondrial function, reduce oxidative stress, and improve physical work capacity. They are recognized adaptogens with documented ergogenic effects in multiple studies.

Shilajit is a mineral-rich natural exudate traditionally used in Ayurveda as a maharasa (super-vitalizer) for stamina and fatigue. A 2024 systematic review (15 studies, n=1,254) and a 2026 open-label pilot RCT found significant improvements in muscle endurance (+12.3%), VO2max, fatigue severity, and perceived exertion following supplementation. Fulvic acids and dibenzo-alpha-pyrones are the primary active compounds supporting mitochondrial ATP production.

Spinach extract supplementation improves endurance outcomes through nitrate-driven nitric oxide generation, which reduces the oxygen cost of submaximal exercise and enhances muscle blood flow. RCTs and a 2025 systematic review confirm improvements in cycle time-trial performance and sustained effort capacity.

Spirulina is a blue-green microalgae rich in protein, phycocyanin, and antioxidants that has been studied in multiple RCTs for endurance performance. Clinical trials show it reduces exercise-induced oxidative stress, decreases fatigue, improves time to exhaustion, and supports VO2max. It also contains iron, B vitamins, and beta-carotene that contribute to oxygen-carrying capacity.

Taurine is a conditionally essential amino acid concentrated in skeletal muscle with multiple roles in physical endurance: it acts as an osmolyte, antioxidant, and modulator of muscle calcium handling. A 2025 systematic review and Bayesian network meta-analysis confirmed taurine supplementation reduces blood lactate and supports anaerobic capacity. Combined with caffeine, it provides balanced ergogenic effects.

TMG (trimethylglycine, betaine) is an osmolyte and methyl donor that supports creatine synthesis and cellular hydration during exercise. Multiple RCTs at 2–2.5 g/day show improvements in muscle endurance, power output, and reduced fatigue. It is the same compound as betaine and has been studied specifically as an ergogenic aid for physical performance.

Tongkat Ali (Eurycoma longifolia) is a traditional Southeast Asian medicinal plant used for stamina and physical vitality. Scientific evidence from RCTs shows it supports physical performance and endurance through testosterone optimization, reduced cortisol, and improved muscular strength. Multiple double-blind RCTs support its ergogenic effects at 200–400 mg/day of standardized extract.

Turkesterone is a phytoecdysteroid from Ajuga turkestanica with structural similarity to ecdysterone but with proposed higher anabolic potency. Preclinical studies show superior muscle protein synthesis effects compared to ecdysterone. While human RCT data are limited, it is increasingly studied for physical endurance and strength based on phytoecdysteroid mechanisms and traditional Central Asian use.

Ubiquinol supplementation has been shown to enhance peak power output and improve aerobic performance markers including VO2Max and anaerobic threshold in athlete populations. A double-blind RCT in Olympic athletes found 300 mg/day for 6 weeks improved maximum power output by 2.5% versus placebo. Research in cross-country skiers found improvements in VO2Max and anaerobic threshold with CoQ10 supplementation.

Multiple human RCTs show UA improves muscle endurance and aerobic capacity. The Liu et al. (JAMA Network Open, 2022) trial in older adults found significant improvements in leg and hand muscle endurance with 1000 mg/day UA over 4 months. The Singh et al. (2022) trial in middle-aged adults showed clinically meaningful gains in VO2peak and 6-minute walk test performance.

Vitamin B12 is essential for red blood cell formation, DNA synthesis, and myelin integrity, making it critical for the oxygen-carrying capacity and neural function underlying physical endurance. Deficiency leads to megaloblastic anemia and severe fatigue. B12 is recognized by the IOC and sport nutrition bodies as a key micronutrient for endurance athletes, particularly vegans/vegetarians at risk of deficiency.

Whey protein is the most studied protein supplement for supporting muscle protein synthesis during endurance training. It contains the highest leucine content of any protein source, rapidly stimulates mTOR-mediated muscle repair, and preserves lean mass during endurance training blocks. Multiple RCTs confirm whey protein supplementation supports endurance athletes by reducing muscle damage and improving recovery between sessions.

Withanolides are the primary bioactive steroidal lactones in Ashwagandha (Withania somnifera) responsible for its adaptogenic effects on physical endurance. Standardized withanolide extracts have been shown in multiple RCTs to improve VO2max, cardiorespiratory endurance, and reduce fatigue. They modulate stress hormones, support anabolic signaling, and reduce exercise-induced oxidative stress.

Multiple human trials show yerba mate augments fat oxidation during endurance exercise and improves time-trial performance in trained cyclists. The effect is partially mediated by caffeine but also by polyphenols that enhance antioxidant status during sustained effort.

Chia has a well-documented traditional use as an endurance food among Aztec, Mayan, and Tarahumara peoples, who consumed it to sustain energy during long hunts, runs, and conquests. Modern clinical trials, however, have not demonstrated a significant ergogenic effect on endurance performance.

Cirsium oligophyllum is a plant used in traditional East Asian medicine, including as an anti-fatigue and stamina tonic. Limited preclinical studies suggest anti-fatigue properties via antioxidant and metabolic mechanisms, but controlled human clinical trial evidence specifically for physical endurance is lacking.

Gypenosides are the bioactive saponins in jiaogulan (Gynostemma pentaphyllum), used in traditional Chinese medicine as an adaptogen for endurance, stamina, and anti-fatigue. Animal studies and limited human data show gypenosides activate AMPK pathways, improve mitochondrial function, and delay fatigue during exercise. Traditional use as a tea for longevity and physical endurance is well-established in southern China.

Jiaogulan (Gynostemma pentaphyllum) is a traditional Chinese herbal tonic used for centuries in southern China for longevity, endurance, and anti-fatigue. Its gypenosides activate AMPK pathways, supporting mitochondrial biogenesis and energy metabolism. Animal studies confirm anti-fatigue effects; limited human data support its adaptogenic and stamina-enhancing properties.

Liver extract has been used traditionally to support physical strength and endurance, and this use is documented in medical literature dating back decades. A mouse model study showed liver hydrolysate activates AMPK, increases muscle glycogen, and reduces blood lactate after forced exercise — a plausible anti-fatigue mechanism. No human clinical trial has confirmed these endurance effects for liquid liver fractions specifically.

Mapuche warriors traditionally consumed maqui specifically for strength, endurance, and stamina, with historical records noting this use in the context of military conflicts and demanding physical labor. Modern science supports maqui's antioxidant and metabolic properties as plausible mechanisms, but no human exercise performance trial exists.

Muira puama has a traditional reputation as a stamina-enhancing and endurance-supporting tonic in Amazonian indigenous medicine. It is employed as part of the polyherbal 'catuama' preparation used in South America for physical vigor. No human clinical trials specifically assessing endurance or stamina outcomes have been published.

San and Khoikhoi hunter-gatherers documented used sceletium to sustain physical performance and endurance during extended hunts. A small RCT (Hoffman et al., 2020) in recreationally trained adults found improvements in complex reactive performance but no effect on physical reaction time, motor reaction time, or physical performance metrics.

Suma has extensive traditional use for increasing athletic endurance and physical stamina, and its beta-ecdysterone content earned it the nickname 'the Russian secret' for alleged use by Soviet Olympic athletes. A human placebo-controlled trial with P. glomerata found no significant performance benefit. Evidence remains traditional and mechanistic.

Tribulus terrestris has a long history of use in Ayurvedic and traditional Chinese medicine as a tonic for strength and stamina. Some studies show its steroidal saponins (protodioscin) may support physical performance, though scientific evidence for endurance enhancement in healthy athletes is inconsistent and not conclusive. Traditional use for vitality and physical stamina is well-documented.

Trichopus zeylanicus (Arogyapacha) is a traditional plant used by the Kani tribe of Kerala, India, as an instant energy booster and anti-fatigue agent. Scientific studies have validated anti-fatigue and adaptogenic effects in animal models, and limited human studies support its use for physical stamina. The plant is classified as an adaptogen in Ayurvedic ethnobotanical traditions.