Phenome Longevity

Longevity Hub › Sport performance

How to Improve Your Athletic Performance: The Complete Guide

Improving how you perform comes down to understanding your body: how it's built, how it responds to training, and how it recovers. Your genes set part of the picture, but training, recovery, nutrition, and the data you track day to day all shape the result.

This guide covers what really drives athletic performance, how your DNA fits in, and how to train smarter using both your biology and real-time insights.

What actually determines athletic performance?

Athletic performance comes from the interaction of three things: your genetics, your training, and your environment. Your genes set your baseline tendencies, your training builds on them, and factors like sleep, nutrition, stress, and recovery decide how much of your potential you reach. No single one of these works alone, which is why the same training plan affects two people differently.

→ What Determines Athletic Performance?

Are athletes born or made?

Both. Your genes set your potential, but training, recovery, and lifestyle decide how much of it you reach. Someone with a genetic edge for endurance can still build strength, and someone without it can still become very fit through consistent training. Genes are a starting point, not a verdict.

→ Are Athletes Born or Made? What the Science Says

How do your genes affect performance?

Your DNA influences several parts of how your body performs, each shaped by many genes working together. The main areas include:

  • Power vs endurance: Some people are naturally more suited to speed and power, others to stamina.
  • Oxygen and energy: Genes affecting blood flow and your cells' energy production influence endurance.
  • Recovery and injury risk: Your genes shape tendon strength and how quickly you bounce back.
  • Metabolism and nutrition: People process carbs and fats differently, partly down to genetics.
  • Mind and motivation: Genes influencing focus, drive, and stress response affect how you train and compete.

Genetics shows the tendencies; how you train turns them into results.

→ Are Athletes Born or Made? What the Science Says

Is there a single "athlete gene"?

No. There's no one "super athlete gene." Athletic ability comes from many genes each adding a small effect, combined with training and environment. ACTN3 is the most studied and often called the "speed gene," but having the favourable version doesn't make someone an athlete on its own, and plenty of elite athletes don't have it.

→ Are Athletes Born or Made? What the Science Says

How do you train smarter for your body?

You improve performance by tailoring your training, recovery, and nutrition to your body instead of following a generic plan. In practice that means:

  • Training to your strengths while still working your weaker areas
  • Recovering properly, adjusting rest if your body bounces back more slowly
  • Fuelling for your metabolism, since people respond differently to carbs and fats
  • Managing injury risk by balancing how hard and how often you train
  • Prioritising sleep and stress, both of which strongly affect performance

Consistency and recovery matter as much as the training itself.

→ How to Train Smarter for Your Body

How important is recovery for performance?

Recovery is where your body actually adapts and gets stronger, not during the workout itself. How well you recover depends on sleep, nutrition, training load, and partly your genetics, which influence how strongly your body responds to inflammation after exercise. Training hard without enough recovery leads to burnout and injury, so balancing the two is essential.

→ Why Recovery Matters for Performance

How do genetics and wearables work together?

Your DNA shows how your body is built; a wearable shows how it's doing right now. A genetic test reveals your long-term tendencies, while a wearable tracks your sleep, recovery, heart rate, and readiness day to day. Used together, they give you both the blueprint and the live feedback:

  • Genes: your baseline tendencies (power vs endurance, recovery, injury risk)
  • Wearables: your real-time data (sleep, recovery, training load, readiness)

Combining the two lets you train to your genetic strengths and adjust to how your body is actually recovering, instead of guessing.

→ Explore the Sports Performance Test
→ Explore the PhenomeTech Ring

Who can benefit from understanding their performance genetics?

Not just elite athletes. Beginners can use these insights to train safely, experienced athletes to refine their approach, and anyone recovering from injury to rebuild more effectively. If you exercise and want to understand your body better, it can help.

→ Genetic Testing for Health: The Complete Guide
→ Longevity: The Complete Guide to Healthy Ageing

Questions

Can genetics predict how good an athlete you'll be?

No. Genes influence tendencies like speed, endurance, and recovery, but training, nutrition, and lifestyle play a huge role, so DNA can't predict performance on its own.

Is athletic ability inherited from your mum or dad?

Both. Athletic traits come from genes contributed by both parents, mixed together, so it's not inherited from one side.

Can you improve your genetic potential?

You can't change your genes, but training, sleep, and nutrition strongly influence how much of your potential you reach.

Do wearables actually help performance?

They can, by showing your recovery, sleep, and readiness so you can adjust your training to how your body is actually responding rather than guessing.

Sources

  1. Bouchard C. et al. (1999). Familial aggregation of VO2max response to exercise training: results from the HERITAGE Family Study. Journal of Applied Physiology, 87(3): 1003-1008. https://pubmed.ncbi.nlm.nih.gov/10484570/
  2. El Ouali E.M., Barthelemy B., Del Coso J. et al. (2024). A Systematic Review and Meta-analysis of the Association Between ACTN3 R577X Genotypes and Performance in Endurance Versus Power Athletes and Non-athletes. Sports Medicine - Open, 10: 37. https://link.springer.com/article/10.1186/s40798-024-00711-x
  3. Pickering C., Kiely J. (2017). ACTN3: More than Just a Gene for Speed. Frontiers in Physiology, 8: 1080. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2017.01080/full
  4. Webborn N. et al. (2015). Direct-to-consumer genetic testing for predicting sports performance and talent identification: Consensus statement. British Journal of Sports Medicine, 49(23): 1486-1491. https://www.stir.ac.uk/research/hub/publication/582303
  5. Montero D., Lundby C. (2017). Refuting the myth of non-response to exercise training: 'non-responders' do respond to higher dose of training. The Journal of Physiology. https://pubmed.ncbi.nlm.nih.gov/28133739/
  6. Meeusen R. et al. (2013). Prevention, diagnosis and treatment of the overtraining syndrome: Joint consensus statement of the European College of Sport Science and the American College of Sports Medicine. European Journal of Sport Science. https://pubmed.ncbi.nlm.nih.gov/23247672/
  7. Cunha L.A. et al. (2023). The Impact of Sleep Interventions on Athletic Performance: A Systematic Review. Sports Medicine - Open. https://link.springer.com/article/10.1186/s40798-023-00599-z
  8. Thomas D.T., Erdman K.A., Burke L.M. (2016). Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. Journal of the Academy of Nutrition and Dietetics. https://www.dietitians.ca/DietitiansOfCanada/media/Documents/Resources/noap-position-paper.pdf

Longevity, in your inboxGet the latest from the Hub.

Evidence based guides on your gut, hormones, genes and healthspan, one thoughtful email a week.

Evidence based longevity, gut and DNA guides.