High-intensity training influences your microbiome and athletic performance, says study

Researchers say that high-intensity training could shift certain bacterial populations, possibly through lactate produced by working muscles (Image: Pexels)

• Intense training increases beneficial gut bacteria in athletes
• Gut microbes may support digestion, energy, and recovery
• Rest periods and diet changes can shift the gut microbiome

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Did you know that your fitness routine and training regime could be rewiring your gut? Could your gut be listening more closely to your training schedule than you realise? According to a study, high-intensity training can alter gut microbiome composition, boosting beneficial bacteria and short-chain fatty acids, which can support digestion, energy, recovery, and athletic performance.

Researchers at Edith Cowan University reveal that the way athletes push themselves could influence the balance of microbes in their digestive systems, with potential effects on energy, recovery, and performance.

PhD candidate Bronwen Charlesson studied how varying training loads — from high-intensity sessions to lighter recovery periods — affect athletes’ gut health. She found that athletes’ microbiomes differ from the general population, showing greater diversity and higher levels of short-chain fatty acids, compounds linked to better digestion and overall wellness.

Also read | Benefits of high-intensity exercise: Is it the best exercise to improve brain health?

Alongside, fitness markers, like oxygen uptake, also appear linked to microbial differences, suggesting the body’s response to training goes beyond muscles and into the gut itself.

High-intensity trainingseems to shift certain bacterial populations, possibly through lactate produced by working muscles. As lactate travels to the gut, microbes break it down, which may encourage the growth of beneficial bacteria.

On the contrary, during low-intensity or rest periods, athletes tended to relax their diets. Fresh fruit and vegetablesgave way to processed foods, and alcohol intake slightly increased. Digestion slowed, and these changes also influenced the microbial community.

What it means for athletes:

Intense workouts shape gut microbes: Higher training loads change levels of short-chain fatty acid and certain bacterial species, suggesting that hard training May encourage microbes linked to recovery and performance.

Also read | High-Intensity Interval Training boosts metabolism and fat loss: Follow these tips for maximum gains

Lactate may feed beneficial bacteria: Lactate produced during exercise could help certain microbes thrive. This aids the  pH balance and lactate processing, the key factors for endurance and recovery.

Rest periods can shift gut balance: Reduced training often tends to bring lower diet quality and slower digestion. This pushes the microbiome in a different direction.

Gut changes and performance links: While the exact impact on performance is still unclear, early clues suggest that microbes may help support strength, recovery and physical output.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.