Power Output is the ability to procure a large amount of strength in a rapid manner, and considered both muscular and neural factors. Supplements that increase power output are of interest to atheltes and strength enthusiasts
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The Human Effect Matrix looks at human studies (excluding animal/petri-dish studies) to tell you what what supplements affect Power Output
| Grade | Level of Evidence |
|---|---|
| A | Robust research conducted with repeated double blind clinical trials |
| B | Multiple studies where at least two are double-blind and placebo controlled |
| C | Single double blind study or multiple cohort studies |
| D | Uncontrolled or observational studies only |
| Level of Evidence | Supplement | Change | Magnitude of Effect Size | Scientific Consensus | Comments |
|---|---|---|---|---|---|
| A | Creatine |  Strong | Creatine is the reference compound for power improvement, with numbers from one meta-analysis to assess potency being "Able to increase a 12% improvement in strength to... show | ||
| A | HMB | Limited evidence supports the increase in power output, which may be due to chance; more often than not, there is no significant influence | |||
| A | Sodium Bicarbonate | Although technically an increase in average power output may occur during exercise associated with the 'burn' (metabolic acidosis) to the degree of 1-2%, saying... show | |||
| B | L-Carnitine | Highly mixed effects on power output, with mostly no significant influence but a possible increase in mean power output occurring in short-term anaerobic endurance exercise... show | |||
| B | Dehydroepiandrosterone | No significant improvement in power output has been noted with DHEA supplementation (studies mostly in older individuals) | |||
| B | Beta-Alanine | No significant effects on acute power output | |||
| B | Caffeine |  Notable | There appears to be a reliable and significant increase in power output (both weight lifting as well as cycle ergometer measurements) in both trained and sedentary persons... show | ||
| B | Whey Protein | There doesn't seem to be an inherent effect of protein on power output, although it may augment training-induced power accural. | |||
| B | Arachidonic acid | ||||
| C | Clenbuterol | Minor | 100% See study | An increase in power output is noted with clenbuterol usage | |
| C | Pyruvate | 100% See study | No significant influence on power output noted with pyruvate supplementation in healthy athletes | ||
| C | Ephedrine | 100% See study | No significant influence on power output with standard oral doses of ephedrine (higher doses may influence power output, but this is not well researched) | ||
| C | Yohimbine | 100% See study | No significant influence on power output noted with yohimbine | ||
| C | Alcohol | Minor | 100% See study | Acute ingestion of alcohol may be able to reduce subsequent power output | |
| C | Nitrate | 100% See study | No significant effect on acute power output | ||
| C | Spirulina | Notable | 100% See study | Notable as acute power output (leg extension measurement) increased by 20-30% (more efficacy in untrained persons, some efficacy in trained persons) after 8 weeks whereas... show | |
| C | Rhodiola Rosea | 100% See study | No significant influences on power output | ||
| C | Velvet Antler | Minor | A lone study noted an increase in muscle torque associated with Velvet Antler supplementation, which needs to be replicated to see if it is a true effect. | ||
| C | Tribulus Terrestris | 100% See 2 studies | No significant alterations in power output associated with tribulus supplementation. | ||
| C | Theaflavins | Minor | 100% See study | An increase in power output on a Wingate test has been noted with theaflavins supplementation above 1,800mg daily; efficacy of lower doses is uncertain | |
| C | Terminalia Arjuna | Minor | 100% See study | Power output has been noted to be increased in sprint tests, which is thought to be secondary to pulmonary effects of terminalia | |
| C | Ecdysteroids | 100% See study | No difference between improvements in power output between ecdysteroids and placebo | ||
| C | Gamma Oryzanol | 100% See study | No interactions with power output have been noted with gamma-oryzanol ingestion | ||
| C | Kaempferia Parviflora | 100% See study | No significant influence on power output when taken acutely before exercise | ||
| C | Arginine | 100% See study | No significant influence on power output | ||
| C | Vitamin D | 100% See study | Although a trend to increase power output has been noted, most research suggest no such benefit | ||
| C | Branched Chain Amino Acids | Mixed effects on power output, but when it does occur it is not a per se increase in power output but secondary to reduced muscular soreness after repeated exercise.... show | |||
| C | Leucine | ||||
| C | Leucic Acid | 100% See study | Power output as assessed by jumping tasks and weightlifting is unaffected | ||
| D | Eurycoma Longifolia Jack | Minor | 100% See study | A slight increase in power output has been noted, which may be secondary to increased training adaptations |
(Common phrases used by users for this page include scientific results for power output, cache:http://examine.com/supplements/Beta-Alanine/)
(Users who contributed to this page include KurtisFrank)
