Urolithin A for Tennis Players

Reviewed by SOMA HEALTH's Medical Research Team

Tennis is a stop-start sport played long. A three-set match is an hour or more of short, explosive sprints, changes of direction and hard strokes, separated by brief pauses, repeated hundreds of times. The player who is still moving well in the third set is usually the one whose muscles keep restoring energy between points. Urolithin A is being studied at that recovery-and-energy layer.

This guide lays out where the human evidence for urolithin A actually stands, what is still limited to cells and animals, and how a competitive tennis player might think about it honestly — without pretending it is more proven than it is.

The repeat-sprint demand

Match-play research describes tennis as a high-intensity intermittent sport: brief, near-maximal efforts on almost every point, with short recovery windows in between. That structure leans on both fast anaerobic bursts for each sprint and stroke, and a strong aerobic base underneath to clear fatigue and refuel those bursts during the 20-second gaps and the changeovers. Your aerobic engine runs on mitochondria — the structures inside muscle cells that turn fuel and oxygen into usable energy. The better that engine resets between points, the more your first-step speed and shot quality survive into a long third set.

With repeated hard training and matches, some mitochondria wear out and become inefficient. Cells clear these through a recycling process called mitophagy, replacing them with fresher units. Urolithin A is of interest because it appears to support that cleanup, which is a core part of mitochondrial health.

What urolithin A is

Urolithin A is a gut postbiotic rather than a nutrient you eat directly. Gut bacteria make it from ellagitannins in pomegranates, walnuts and some berries — but only some people carry the microbial mix to produce useful amounts, so dietary levels vary widely from player to player. Supplementing the finished compound sidesteps that lottery. For the full background, see our urolithin A guide and our foods high in urolithin A page.

The human evidence, strongest to newest

Safety and a mitochondrial signature

The first-in-human trial (Andreux and colleagues, Nature Metabolism, 2019) established that urolithin A was safe and well tolerated at single doses up to 1,000 mg per day and reported a mitochondrial gene-expression signature in muscle consistent with the mechanism seen in the lab. This is the safety and dosing foundation the rest of the field is built on.

Muscle endurance and strength

A randomized trial in older adults (Liu, D'Amico and colleagues, JAMA Network Open, 2022) associated roughly four months of urolithin A with improved muscle endurance. A randomized trial in middle-aged adults (Singh and colleagues, Cell Reports Medicine, 2022), testing 500 mg and 1,000 mg arms over four months, reported benefits for muscle strength and aspects of exercise performance. For a tennis player, muscle endurance — keeping your legs and strokes from fading over a long match — is the most directly relevant of these outcomes.

Newer human findings

An eight-week randomized trial in resistance-trained men (Journal of the International Society of Sports Nutrition, 2024) looked at urolithin A in already-conditioned athletes, a closer comparison to a trained player than sedentary volunteers. A 2025 trial in distance runners extended the work into endurance athletes. And a 2025 randomized controlled trial in Nature Aging reported that about four weeks of urolithin A supported the mitochondrial health of immune cells in midlife adults, part of the emerging inflammaging research. These findings are promising and consistent in direction, but the overall human dataset is still modest and varied in design, and none of it was conducted in tennis players specifically.

What is still preclinical

Several eye-catching claims about urolithin A rest only on cells and animals, and it is important to say so. The foundational study by Ryu and colleagues (Nature Medicine, 2016) showed urolithin A induced mitophagy, extended lifespan in the worm C. elegans, and improved muscle function in rodents — the reason the compound is studied at all, but not evidence that transfers automatically to human athletes. D'Amico and colleagues (Aging Cell, 2022) reported effects on joint and cartilage tissue in osteoarthritis models — suggestive for a joint-loading sport like tennis, but this is preclinical disease-model work, not proof the gummies do anything for a player's knees, hips or elbow. Early exploratory research is also examining skin, gut, heart and brain, and all of that is preliminary.

A 2024 systematic review in Ageing Research Reviews on targeting aging with urolithin A in humans summarized it honestly: the human evidence is still emerging. Urolithin A is a mechanistically grounded ingredient with a growing but unfinished human dataset for muscle and mitochondrial endpoints — not a settled performance guarantee.

Practical guidance for tennis players

Human studies used 500 to 1,000 mg per day, with 1,000 mg at the top, and benefits accumulated over roughly four months of daily use. That makes urolithin A a training-block supplement, not a pre-match stimulant — you build it in over a season rather than reaching for it before a big match. Our pages on how long urolithin A takes to work and urolithin A for muscle cover timelines and mechanism in more detail.

It also will not substitute for the things that actually build a durable tennis player: on-court conditioning, repeat-sprint and interval work, strength training, sleep and adequate fuel. Urolithin A supports the cellular energy machinery underneath all of that; it is one input layered on top of the fundamentals, not a shortcut around them. Our best urolithin A gummies page can help you compare formats if you decide to try it.

A note on your body: tennis elbow, knee pain, cramping and other issues are not conditions a supplement treats. Urolithin A is not a treatment for any medical condition, and nothing here is medical advice. If you have a nagging injury or health concern, or you are pregnant, nursing or on medication, talk with your doctor before starting anything new.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This guide is educational and is not a substitute for advice from a qualified healthcare provider.