Lifestyle changes
Progress your training gradually and include enough recovery between demanding sessions. Combine strength, aerobic activity, and mobility according to your goals, with a consistent sleep routine to support the work.
Fitness
Fitness is the ability to meet physical demands and recover well enough to keep progressing. It brings together strength, endurance, movement quality, and the confidence to take part in activities you enjoy. Whether you are establishing a routine or improving a specific performance, a clear goal gives your efforts direction. The support needed depends on the work involved. Short, intense efforts place different demands on the body from prolonged activity, while repeated training also requires attention to muscle repair, connective tissue, and fluid balance. Targeted nutrition can help meet these demands and make a well-designed training routine easier to sustain. Useful progress shows up in the activity itself. Completing more quality repetitions, maintaining a comfortable pace, or recovering more reliably between sessions can each represent a worthwhile improvement. Choosing the outcome that matters most to you helps distinguish essential support from additions that have little relevance to your training.
Warnings
- Count all stimulants: Count caffeine from drinks and supplements together. Review intake if you notice jitteriness, palpitations, anxiety, or disrupted sleep.
- Kidney disease changes supplement safety: Kidney function affects how the body handles several minerals and other ingredients. Seek individual advice before adding products, especially potassium or magnesium, if you have kidney disease or relevant medicines.
- Match fluids to your needs: Adjust fluids to your activity, the weather, and any health-related guidance. Both too little and excessive intake can cause problems.
- Avoid overlapping high doses: Count nutrients from multivitamins, individual supplements, and fortified products together. Keep the combined amounts within appropriate limits for your circumstances.
Ingredient overview
Goal guidance
Diet changes
Eat enough for your training, with protein across the day and carbohydrates suited to the workload. Plan fluids around session length, conditions, and how much you sweat.
Who this is for
Active adults working toward stronger lifts, better stamina, improved recovery, or a more consistent training routine.
Who should be careful
Get individual advice with cardiovascular or kidney conditions or medicines affecting fluid balance. Check stimulant totals and product quality; persistent exercise-related pain, dizziness, or unusual breathlessness needs assessment.
Expected timeline
Some ingredients support an individual session, while strength and endurance develop through consistent training over weeks and months. Compare similar workouts to see how you are progressing.
Common mistakes
A demanding program needs enough food, sleep, and recovery to remain productive. Introduce supplements one at a time and avoid treating a strong stimulant sensation as a measure of workout quality.
Ingredients
Creatine Other Nutrients
Impact
Highest effect
Typical dose3000–5000 mg / day
Creatine increases phosphocreatine stores in muscles, which aids in the rapid regeneration of ATP, the primary energy currency of the cell. This leads to tangible improvements in strength, power output, and the ability to perform more repetitions during resistance training.
Study evidence
143 studiesCreatine can improve strength, power, and gains in lean mass, particularly alongside resistance training or repeated high-intensity exercise. Benefits vary by activity and population, and it does not reliably improve aerobic endurance; increases in body mass may also matter in weight-sensitive sports.
Magnesium Minerals
Impact
Highest effect
Typical dose200–400 mg / day
Magnesium participates in over 300 enzymatic reactions, including glycolysis and ATP synthesis. Ensuring adequate levels can prevent cramping, improve sleep quality for better recovery, and support overall metabolic and cardiovascular health under physical stress.
Study evidence
29 studiesMagnesium research shows mixed findings for exercise performance and recovery, with no consistent advantage established for healthy people whose magnesium status is adequate. Positive signals in some settings coexist with neutral and occasionally unfavourable findings.
Vitamin D Vitamins
Impact
Highest effect
Typical dose1000–4000 IU / day
Vitamin D functions as a steroid hormone, playing a key role in muscle function and strength. Widespread deficiency can impair athletic performance, and supplementation to optimal levels supports the body's foundational systems for training and adaptation.
Study evidence
163 studiesVitamin D supplementation does not reliably improve fitness, strength, or exercise performance, even though low blood levels are often associated with poorer function. Benefits occur in some groups and outcomes, but raising levels alone does not guarantee improvement, and some regimens have worsened performance or increased falls.
Arginine Amino Acids
Impact
High effect
Typical dose3–8 g / day
Enhanced nitric oxide production from Arginine leads to increased blood flow to working muscles during exercise. This improved circulation facilitates better delivery of oxygen and nutrients, while simultaneously aiding in the removal of metabolic byproducts like lactic acid. The result can be enhanced endurance, reduced fatigue, and improved overall athletic performance and recovery.
Study evidence
23 studiesArginine has mixed evidence for improving fitness: pooled research suggests possible benefits for exercise capacity, but many trials show no improvement in strength or endurance, particularly in trained athletes. Changes in blood flow or metabolism do not consistently translate into better performance.
Ashwagandha Botanicals
Impact
High effect
Typical dose300–600 mg / day
Intense training is a physical stressor that elevates cortisol. Ashwagandha helps the body adapt to this stress, leading to better hormonal balance, reduced feelings of fatigue, and improved sleep quality, which are all fundamental for optimal physical recovery and progress.
Study evidence
23 studiesAshwagandha may improve strength gains alongside resistance training and may support aerobic fitness. Benefits vary across studies, however, and some controlled research finds no added improvement in endurance beyond training alone; effects on body fat are also inconsistent.
Beta-Alanine Amino Acids
Impact
High effect
Typical dose3200–6400 mg / day
By increasing carnosine, Beta-Alanine helps to neutralize the hydrogen ions that accumulate during intense exercise, which are responsible for the 'burning' sensation and fatigue. This tangibly extends performance in activities lasting 1-4 minutes, such as interval training or high-rep weightlifting sets.
Study evidence
No published studies for this goal yet.
Studies
Explore published research for this goal.
Sources
Up to five highest-ranked published examples per ingredient. Study counts and charts include all published studies for the connection.
- Creatine in combination with resistance training and improvement in muscle strength: evaluation of a health claim pursuant to Article 13(5) of Regulation (EC) No 1924/2006.
- Effect of creatine and weight training on muscle creatine and performance in vegetarians.
- Long-term creatine intake is beneficial to muscle performance during resistance training.
- Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial.
- The Additive Effects of Creatine Supplementation and Exercise Training in an Aging Population: A Systematic Review of Randomized Controlled Trials.
- Total magnesium intake and risk of frailty in older women.
- Dietary Magnesium May Be Protective for Aging of Bone and Skeletal Muscle in Middle and Younger Older Age Men and Women: Cross-Sectional Findings from the UK Biobank Cohort.
- Dietary Magnesium Is Positively Associated With Skeletal Muscle Power and Indices of Muscle Mass and May Attenuate the Association Between Circulating C-Reactive Protein and Muscle Mass in Women.
- Nutritional intake as a determinant of high-speed resistance and multicomponent training efficacy on strength in older women at risk of sarcopenia. A randomized clinical trial.
- Minerals and Sarcopenia in Older Adults: An Updated Systematic Review.
- Effect of Calcifediol on Physical Performance and Muscle Strength Parameters: A Systematic Review and Meta-Analysis.
- Effects of vitamin D supplementation on upper and lower body muscle strength levels in healthy individuals. A systematic review with meta-analysis.
- Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players.
- Effects of Vitamin D Supplementation in Elite Athletes: A Systematic Review.
- Association between serum vitamin D levels and cardiorespiratory fitness in the adult population of the USA.
- The effect of L-arginine supplementation on maximal oxygen uptake: A systematic review and meta-analysis.
- L-Arginine Enhances the Effects of Cardiac Rehabilitation on Physical Performance: New Insights for Managing Cardiovascular Patients During the COVID-19 Pandemic.
- THE EFFECT OF A SINGLE ORAL DOSE OF L-ARGININE ON QUADRICEPS STRENGTH IN SMOKERS AND NON-SMOKERS: A NON-RANDOMIZED CLINICAL TRIAL.
- Efficacy of amino acids in sports nutrition- review of clinical evidences.
- Chronic L-arginine supplementation enhances endurance exercise tolerance in heart failure patients.
- Effects of an Aqueous Extract of Withania somnifera on Strength Training Adaptations and Recovery: The STAR Trial.
- Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adults.
- Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study.
- Effects of Withania somnifera (L.) Dunal (Ashwagandha) on cognitive and physical function in adults: a systematic review and meta-analysis.
- Effects of eight-week supplementation of Ashwagandha on cardiorespiratory endurance in elite Indian cyclists.
- Effects of chronic betaine supplementation on performance in professional young soccer players during a competitive season: a double blind, randomized, placebo-controlled trial.
- Effects of short-term betaine supplementation on muscle endurance and indices of endocrine function following acute high-intensity resistance exercise in young athletes.
- Effects of Nutrition Interventions on Athletic Performance in Soccer Players: A Systematic Review.
- Betaine supplementation improves CrossFit performance and increases testosterone levels, but has no influence on Wingate power: randomized crossover trial.
- Effects of Betaine Supplementation on Muscle Strength and Power: A Systematic Review.
- Effect of caffeine ingestion on cycling performance: a systematic review and meta-analysis.
- Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis.
- Acute Effects of Caffeine Supplementation on Movement Velocity in Resistance Exercise: A Systematic Review and Meta-analysis.
- Sex Differences in the Ergogenic Response of Acute Caffeine Intake on Muscular Strength, Power and Endurance Performance in Resistance-Trained Individuals: A Randomized Controlled Trial.
- Can I Have My Coffee and Drink It? A Systematic Review and Meta-analysis to Determine Whether Habitual Caffeine Consumption Affects the Ergogenic Effect of Caffeine.
- The Effects of Combined Exercise with Citrulline Supplementation on Body Composition and Lower Limb Function of Overweight Older Adults: A Systematic Review and Meta-Analysis.
- Effect of High-Intensity Interval Training Combined with L-Citrulline Supplementation on Functional Capacities and Muscle Function in Dynapenic-Obese Older Adults.
- Initial Dietary Protein Intake Influence Muscle Function Adaptations in Older Men and Women Following High-Intensity Interval Training Combined with Citrulline.
- Effects of Citrulline alone or combined with exercise on muscle mass, muscle strength, and physical performance among older adults: a systematic review.
- Combined Vs. Single Supplementation of L-Citrulline and Sodium Bicarbonate During Sprint Interval Training in Basketball Players: Effects on Physical Performance and Hormonal Adaptations.
- Fish oil-derived n-3 PUFA therapy increases muscle mass and function in healthy older adults.
- Fish-oil supplementation enhances the effects of strength training in elderly women.
- Effects of fish oil-derived n-3 polyunsaturated fatty acid on body composition, muscle strength and physical performance in older people: a secondary analysis of a randomised, double-blind, placebo-controlled trial.
- Effects of Omega-3 Fatty Acids on Muscle Mass, Muscle Strength and Muscle Performance among the Elderly: A Meta-Analysis.
- Efficacy of Boswellia serrata Extract and/or an Omega-3-Based Product for Improving Pain and Function in People Older Than 40 Years with Persistent Knee Pain: A Randomized Double-Blind Controlled Clinical Trial.
- A systematic review and meta-analysis of propionyl-L-carnitine effects on exercise performance in patients with claudication.
- Oral acetyl-L-carnitine therapy reduces fatigue in overt hepatic encephalopathy: a randomized, double-blind, placebo-controlled study.
- Prolonged oral L-carnitine substitution increases bicycle ergometer performance in patients with severe, ischemically induced cardiac insufficiency.
- L-Carnitine treatment reduces severity of physical and mental fatigue and increases cognitive functions in centenarians: a randomized and controlled clinical trial.
- Effects of nine weeks L-Carnitine supplementation on exercise performance, anaerobic power, and exercise-induced oxidative stress in resistance-trained males.
- Taurine supplementation enhances anaerobic power in elite speed skaters: A double-blind, randomized, placebo-controlled, crossover study.
- The effect of acute taurine ingestion on 3-km running performance in trained middle-distance runners.
- Effects of different doses of taurine supplementation on repeated-sprint performance after exhaustive exercise in a high temperature and humidity environment.
- Oral taurine improves critical power and severe-intensity exercise tolerance.
- Acute taurine supplementation enhances thermoregulation and endurance cycling performance in the heat.
- Inter-individual variability in redox and performance responses after antioxidant supplementation: A randomized double blind crossover study.
- Antioxidant supplementation, redox deficiencies and exercise performance: A falsification design.
- A significant relationship between plasma vitamin C concentration and physical performance among Japanese elderly women.
- Low vitamin C values are linked with decreased physical performance and increased oxidative stress: reversal by vitamin C supplementation.
- Low dietary vitamin C intake is associated with low muscle strength among elderly Korean women.
- The Effects of 6 Weeks of Tribulus terrestris L. Supplementation on Body Composition, Hormonal Response, Perceived Exertion, and CrossFit® Performance: A Randomized, Single-Blind, Placebo-Controlled Study.
- The effect of five weeks of Tribulus terrestris supplementation on muscle strength and body composition during preseason training in elite rugby league players.
- The effects of Tribulus terrestris on body composition and exercise performance in resistance-trained males.
- Insights into Supplements with Tribulus Terrestris used by Athletes.
- Tribulus terrestris extracts alleviate muscle damage and promote anaerobic performance of trained male boxers and its mechanisms: Roles of androgen, IGF-1, and IGF binding protein-3.
- Which Protein-Based Dietary Supplements Most Effectively Enhance Fat-Free Mass and Strength Gains in Healthy Adults Undergoing Resistance Training? A Network Meta-Analysis.
- Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men: a randomised controlled trial.
- Dietary collagen peptides alleviate exercise-induced muscle soreness in healthy middle-aged males: a randomized double-blinded crossover clinical trial.
- Effects of Specific Bioactive Collagen Peptides in Combination with Concurrent Training on Running Performance and Indicators of Endurance Capacity in Men: A Randomized Controlled Trial.
- Collagen Peptide Supplementation Enhances Muscle-Tendon Stiffness and Explosive Strength: A 16-wk Randomized Controlled Trial.
- The effect of curcumin supplementation on delayed-onset muscle soreness, inflammation, muscle strength, and joint flexibility: A systematic review and dose-response meta-analysis of randomized controlled trials.
- The Effects of Curcumin Supplementation on Muscle Damage, Oxidative Stress, and Inflammatory Markers in Healthy Females with Moderate Physical Activity: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial.
- Modulation of Exercise-Induced Muscle Damage, Inflammation, and Oxidative Markers by Curcumin Supplementation in a Physically Active Population: A Systematic Review.
- Effects of Turmeric Concentrate on Cardiovascular Risk Factors and Exercise-Induced Oxidative Stress in Healthy Volunteers; an Exploratory Study.
- Effects of curcumin supplementation on sport and physical exercise: a systematic review.
- Ferric carboxymaltose in patients with heart failure and iron deficiency.
- Marginal iron deficiency without anemia impairs aerobic adaptation among previously untrained women.
- Ferric Carboxymaltose Versus Ferrous Fumarate in Anemic Children with Inflammatory Bowel Disease: The POPEYE Randomized Controlled Clinical Trial.
- Daily iron supplementation for improving anaemia, iron status and health in menstruating women.
- Altered metabolic response of iron-depleted nonanemic women during a 15-km time trial.
- Longitudinal Association Between Sodium and Potassium Intake and Physical Performance in Older Adults.
- Exercise-induced hyperkalaemia can be reduced in human subjects by moderate training without change in skeletal muscle Na,K-ATPase concentration.
- Potassium Nitrate in Heart Failure With Preserved Ejection Fraction: A Randomized Clinical Trial.
- Potassium Bicarbonate Supplementation Lowers Bone Turnover and Calcium Excretion in Older Men and Women: A Randomized Dose-Finding Trial.
- Exercise-Associated Muscle Cramps in Ironman-Distance Triathletes Over 3 Decades.
- Effects of Rhodiola rosea on Physical and Decision-Making Performance in Football Players: A Randomised Controlled Trial.
- Dose-Response Effects of Short-Term Rhodiola rosea (Golden Root Extract) Supplementation on Anaerobic Exercise Performance and Cognitive Function in Resistance-Trained Athletes: A Randomized, Crossover, Double-Blind, and Placebo-Controlled Study.
- The Effect of Short-Term Rhodiola rosea Supplementation on Simulated Game Time, Perceived Fatigue, and Performance in Basketball Players.
- Combined Rhodiola rosea and eccentric training boost endurance performance and lower-limb reactive strength in recreationally active women.
- The Impact of Rhodiola Rosea Extract on Strength Performance in Alternative Bench-Press and Bench-Pull Exercises Under Resting and Mental Fatigue Conditions: A Randomized, Triple-Blinded, Placebo-Controlled, Crossover Trial.
- Additive effects of beta-alanine and sodium bicarbonate on upper-body intermittent performance.
- Sodium Hyperhydration Improves Performance With No Change in Thermal and Cardiovascular Strain in Female Cyclists Exercising in the Heat Across the Menstrual Cycle.
- Sodium bicarbonate supplementation improves severe-intensity intermittent exercise under moderate acute hypoxic conditions.
- International Society of Sports Nutrition position stand: sodium bicarbonate and exercise performance.
- The effects of sodium bicarbonate ingestion on swimming interval performance in trained competitive swimmers.
- Association between composite dietary antioxidant index and handgrip strength in American adults: Data from National Health and Nutrition Examination Survey (NHANES, 2011-2014).
- Serum essential elements and muscle health in Chinese adults: a community-based study.
- [Survey of the dietary status and physical activity level and fitness of college freshmen in Chengdu].
- A comprehensive review of the physiology and evidence base to guide the use of ergogenic and medical supplements for enhanced cycling performance.