Endpoint
Peak power output
CAT:outcome/peak-power-outputreported in W7 findings from 4 compounds
What moved it
How to read these marks7 findings · 4 compounds · 5 null · by evidence strength
| Compound | Direction | Findings | Strongest evidence |
|---|---|---|---|
| nitrate | no effect | 1 | Evidence strength: moderate. Human evidence with one recorded weakness, or capped at moderate by its design or by unread numbers. |
| L-tyrosine | no effect | 1 | Evidence strength: limited. Human evidence with several recorded weaknesses, or a design that tops out at limited. |
| caffeine | up 2 · no effect 2 | 4 | Evidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence. |
| magnesium(2+) | no effect | 1 | Evidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence. |
Reported to move it
2 findings
caffeine — increases
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.Findingreplicated ×1“During the caffeine trial, more total weight was lifted with the chest press, and a greater peak power was obtained during the Wingate test.”
Quoted verbatim from The effect of caffeine as an ergogenic aid in anaerobic exercise.. - Study
- RCT
- Participants
- 18
- Dose
- 5 mg/kg body weight caffeine, single acute dose
- Population
- male athletes (24.1±5.8 yr; BMI 26.4±2.2 kg/m2), anaerobic exercise testing (leg press, chest press, 30-s Wingate test)
The effect of caffeine as an ergogenic aid in anaerobic exercise.2008PMID:18708685Permalink
caffeine — increases
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.Findingreplicated ×1“Absolute and relative peak power (287 ± 72 vs 281 ± 69 W & 8.0 ± 0.9 vs 7.8 ± 1.0 W·kg-1) were significantly higher in CAF-3 vs PL, respectively.”
Quoted verbatim from Effects of different doses of caffeine on anaerobic exercise in boys.. - Study
- crossover
- Participants
- 26
- Dose
- 3 mg/kg anhydrous caffeine (CAF-3) in cherry-flavored Sprite, 60 min before testing
- Population
- 8- to 10-year-old boys; CAF-3 dose (3 mg/kg) vs placebo during a 30-s Wingate test
Effects of different doses of caffeine on anaerobic exercise in boys.2015PMID:25051124Permalink
Measured, no effect detected
5 findings
nitrate — no detected effect on
ModerateEvidence strength: moderate. Human evidence with one recorded weakness, or capped at moderate by its design or by unread numbers.FindingNull result“A random effects model was performed on six studies and showed that dietary nitrate had significant effects on time-to-peak power (SMD: -0.66, 95% CI: -1.127 to -0.192, p = 0.006) but not on mean power, peak power, or minimum power.”
Quoted verbatim from Effects of Dietary Nitrate Supplementation on High-Intensity Cycling Sprint Performance in Recreationally Active Adults: A Systematic Review and Meta-Analysis.. - Study
- meta-analysis
- Population
- healthy recreationally active adults performing 30-s cycling sprints
Effects of Dietary Nitrate Supplementation on High-Intensity Cycling Sprint Performance in Recreationally Active Adults: A Systematic Review and Meta-Analysis.2024PMID:39203900Permalink
L-tyrosine — no detected effect on
LimitedEvidence strength: limited. Human evidence with several recorded weaknesses, or a design that tops out at limited.FindingNull result“No differences were found for peak power output (p = .486; 715 ± 98W vs 724 ± 98W, respectively), decision-making (p = .627; 86.9 ± 10.7% vs 88.6 ± 7.0%, respectively), cognitive appraisal (p = .693, 0.90 ± 0.42 vs 0.88 ± 0.39, respectively) nor affective states (p = .918; 1.15 ± 1.55 vs 1.14 ± 1.70, respectively) between tyrosine and placebo conditions.”
Quoted verbatim from Tyrosine supplementation is ineffective in facilitating soccer players' physical and cognitive performance during high-intensity intermittent exercise in hot conditions.. - Study
- crossover
- Dose
- 150 mg/kg, single dose
- Population
- Trained male soccer players during a 92-minute high-intensity intermittent cycling sprint protocol at 32 C, 50% relative humidity
Tyrosine supplementation is ineffective in facilitating soccer players' physical and cognitive performance during high-intensity intermittent exercise in hot conditions.2025PMID:39820592Permalink
magnesium(2+) — no detected effect on
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.FindingNull result“The peak power was unaffected by magnesium (655 ± 150 with the placebo vs. 665 ± 185 W with magnesium; p = 0.70).”
Quoted verbatim from Short-Term Magnesium Supplementation Has Modest Detrimental Effects on Cycle Ergometer Exercise Performance and Skeletal Muscle Mitochondria and Negligible Effects on the Gut Microbiota: A Randomized Crossover Clinical Trial.. - Study
- crossover
- Participants
- 13
- Duration
- 9 days
- Dose
- magnesium chloride 300 mg (ReMag) twice per day for 9 days
- Population
- Healthy regularly exercising adults aged 18-40; primary outcome (sprint exercise performance); 30-second all-out cycle ergometer sprint, complete data available for 13 of 15 participants
Short-Term Magnesium Supplementation Has Modest Detrimental Effects on Cycle Ergometer Exercise Performance and Skeletal Muscle Mitochondria and Negligible Effects on the Gut Microbiota: A Randomized Crossover Clinical Trial.2025PMID:40077784Industry fundedPermalink
caffeine — no detected effect on
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.FindingNull resultreplicated ×1“In comparison with placebo, caffeine had no significant effect on peak power (p = 0.11), mean power (p = 0.55), or time to peak power (p = 0.17).”
Quoted verbatim from Caffeine and sprinting performance: dose responses and efficacy.. - Study
- crossover
- Dose
- 2, 4, 6, 8, or 10 mg/kg body mass caffeine, single dose 1 hour before sprint trials
- Population
- 17 well-trained men, sprint cyclists
Caffeine and sprinting performance: dose responses and efficacy.2012PMID:22388491Permalink
caffeine — no detected effect on
InsufficientEvidence strength: insufficient. Mechanistic inference, no evidence found, or evidence weakened below very limited.FindingNull resultreplicated ×1“Caffeine had no significant effect on peak power, work output, RPE, or peak heart rate.”
Quoted verbatim from Physiological and cognitive responses to caffeine during repeated, high-intensity exercise.. - Study
- crossover
- Participants
- 17
- Dose
- 6 mg/kg caffeine, single dose 90 min before exercise, crossover with placebo and no-treatment control
- Population
- mixed-sex subjects (5 female of 17), repeated anaerobic exercise (two 60-s maximal cycling bouts)
Physiological and cognitive responses to caffeine during repeated, high-intensity exercise.2006PMID:17240784Permalink
How it is measured
Highest mechanical power in a single maximal effort, cycle ergometer, typically the first five seconds of a 30-second Wingate test.
Measured, not recorded
- Subject
- peak power output
- Measurements
- 3 measurements
- Recorded as a finding
- No
Show what was measured
peak power output
no effect, δ = 0.41, p = 0.1
However, there was no effect of creatine on measures of peak power (δ = 0.41; p = .10), fatigue (δ = 0.08; p = .61), or posttest blood lactate concentration (D = 0.22 L/min; p = .60).
PMID:36041731 · one of two readings recorded this
peak power output
no effect, p = 0.486, n = 8
peak power output (p = .486; 715 ± 98W vs 724 ± 98W, respectively)
PMID:39820592 · one of two readings recorded this
peak power output
increases, p = 0.048
The PAPE*TAU condition resulted in significantly higher peak power output (16.76% increase; p = 0.048) and power relative to body mass (22.24% increase; p = 0.028) compared to PAPE*PLA and CON
PMID:42112616 · one of two readings recorded this
Sources cited
7 papers
- Subject
- peak power output
- Findings
- 7
- Papers
- 7
Short-Term Magnesium Supplementation Has Modest Detrimental Effects on Cycle Ergometer Exercise Performance and Skeletal Muscle Mitochondria and Negligible Effects on the Gut Microbiota: A Randomized Crossover Clinical Trial.record2025PMID:400777841 finding
Tyrosine supplementation is ineffective in facilitating soccer players' physical and cognitive performance during high-intensity intermittent exercise in hot conditions.record2025PMID:398205921 finding
Effects of Dietary Nitrate Supplementation on High-Intensity Cycling Sprint Performance in Recreationally Active Adults: A Systematic Review and Meta-Analysis.record2024PMID:392039001 finding
Effects of different doses of caffeine on anaerobic exercise in boys.record2015PMID:250511241 finding
Caffeine and sprinting performance: dose responses and efficacy.record2012PMID:223884911 finding
The effect of caffeine as an ergogenic aid in anaerobic exercise.record2008PMID:187086851 finding
Physiological and cognitive responses to caffeine during repeated, high-intensity exercise.record2006PMID:172407841 finding