Maca for Athletes: What the Evidence Actually Says
Maca (Lepidium meyenii) is an Andean root vegetable that has been used for centuries as a food staple and traditional adaptogen. In recent years it has attracted serious attention from athletes looking for a natural performance edge. But does the science support the hype? Here is an honest look at what is known.
How Maca May Work in Sport
Maca does not appear to act on testosterone directly in the way anabolic compounds do. Instead, it seems to influence the hypothalamic-pituitary axis and supports the body's own hormonal balance rather than flooding it with exogenous hormones. Animal studies suggest maca may support luteinising hormone signalling, but human data are more modest.
Its alkaloids — macamides and macaridine — are thought to be the key bioactive compounds. These are unique to maca and may modulate endocannabinoid pathways, which in turn influence mood and energy perception. The practical upshot for athletes is improved subjective energy and reduced fatigue perception, which can translate to better training sessions even when objective hormonal markers remain unchanged.
Strength and Endurance Evidence
A randomised, double-blind crossover trial by Stone et al. (2016) examined maca supplementation in male cyclists and found a modest improvement in 40-km time-trial performance after 14 days of supplementation compared to placebo (Stone et al., 2016). The effect size was small but statistically significant.
For strength athletes, the evidence is thinner. A small pilot study by Gonzales et al. (2002) reported that maca supplementation over eight weeks was associated with improved self-reported energy and sexual desire in healthy men, but did not measure strength outputs directly (Gonzales et al., 2002). Until larger, well-controlled resistance-training studies are published, extrapolating to gym performance must be done cautiously.
Effective Protocol
Most human studies have used daily doses in the range of 1.5 g to 3 g of gelatinised or dried maca powder. Gelatinisation removes the starch content, which may improve digestibility without meaningfully altering the alkaloid profile. Supplementation periods in the literature range from two weeks to twelve weeks, with benefits typically emerging after two to four weeks of consistent use.
Timing is flexible — maca contains no stimulants and does not need to be taken at a specific window around training. Many athletes take it with a meal to aid absorption and tolerability.
At maxfit.ee you can find NOW Maca 500mg 100 veg. caps. and Ostrovit Maca 90tab, both sourced from reputable manufacturers and available with straightforward ingredient lists. NOW Maca 500mg 250 veg. caps. is also an option for those who prefer a larger supply. Browse the full maca selection for current availability.
Who Benefits Most
The athletes most likely to see meaningful results are:
- Endurance athletes — the time-trial data are the strongest evidence base.
- Athletes in caloric deficit — maca's adaptogenic properties may help blunt stress responses during cutting phases.
- Those seeking non-stimulant energy support — maca suits athletes who are sensitive to caffeine or already stacking other pre-workout ingredients.
- Masters athletes (40+) — some evidence suggests maca may support hormonal balance in older individuals, although the data are not conclusive.
Maca is not a substitute for adequate sleep, training load management, or a calorie-sufficient diet. It is a modest tool in a broader performance stack.
Honest Verdict
Maca is one of the better-studied plant-based performance supplements, but the honest summary is that effect sizes in human trials are small. It is safe, well-tolerated, and may provide a genuine but modest benefit to endurance performance and subjective energy. It is not a performance revolution, but for athletes who have the fundamentals covered and want a non-stimulant, adaptogenic addition to their stack, maca is a reasonable choice.
References
Stone, M., Ibarra, A., Roller, M., Zangara, A., & Stevenson, E. (2016). A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen. Journal of Ethnopharmacology, 126(3), 574-576. https://doi.org/10.1016/j.jep.2009.09.012
Gonzales, G. F., Cordova, A., Vega, K., Chung, A., Villena, A., Gonez, C., & Castillo, S. (2002). Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia, 34(6), 367-372. https://pubmed.ncbi.nlm.nih.gov/12472620/
Zheng, B. L., He, K., Kim, C. H., Rogers, L., Shao, Y., Huang, Z. Y., Lu, Y., Yan, S. J., Qien, L. C., & Zheng, Q. Y. (2000). Effect of a lipidic extract from Lepidium meyenii on sexual behavior in mice and rats. Urology, 55(4), 598-602. https://pubmed.ncbi.nlm.nih.gov/10736519/
FAQ
Does maca increase testosterone in athletes?
Not reliably. Human trials have not consistently shown that maca raises serum testosterone. Its hormonal effects appear more indirect, potentially supporting the hypothalamic-pituitary axis rather than acting as an androgenic compound.
How long does maca take to work?
Most studies reporting positive effects used supplementation periods of at least two to four weeks. Expect no overnight results — consistent daily use over several weeks is needed to evaluate whether it is working for you.
Can women use maca for sport?
Yes. Maca is not an androgenic compound and is used by both men and women. Some evidence suggests it may support mood and energy in women, particularly during periods of hormonal fluctuation, though athletic-specific trials in female populations are limited.
