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Microbiota Mediate Enhanced Exercise Capacity Induced by Exercise Training.

Robert A Dowden, Paul J Wisniewski, Candace R Longoria

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Medicine and Science in Sports and Exercise
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Summary
This summary is machine-generated.

Gut microbes enhance exercise capacity by improving muscle blood flow and mitochondrial function. Eliminating gut microbes with antibiotics negates these performance benefits, highlighting their crucial role in exercise adaptation.

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Area of Science:

  • Exercise physiology
  • Microbiome research
  • Skeletal muscle metabolism

Background:

  • Exercise training improves exercise performance through various physiological adaptations.
  • The role of the gut microbiome in mediating these adaptations is increasingly recognized.
  • Understanding these mechanisms is crucial for optimizing athletic performance.

Purpose of the Study:

  • To investigate the effects of gut microbes on exercise performance in male mice.
  • To elucidate the mechanisms by which gut microbiota mediate enhanced exercise capacity after training.
  • To examine the impact of exercise training on skeletal muscle blood flow, mitochondrial biogenesis, and oxidative function.

Main Methods:

  • Male mice underwent graded exercise tests before and after a 5-week treadmill training program.
  • Gut microbes were eliminated using antibiotic (ABX)-treated water to assess their role.
  • Measurements included maximal running distance, work to exhaustion, hindlimb blood flow, and mitochondrial markers.

Main Results:

  • Exercise training significantly increased maximal running distance and work to exhaustion.
  • These performance enhancements were completely abolished after antibiotic treatment.
  • Training-induced improvements in blood flow and mitochondrial function (AMPK, SIRT1, PGC-1α, CS, CIV, NO) were also abrogated by antibiotics.

Conclusions:

  • Gut microbiota play a critical role in mediating exercise-induced improvements in exercise capacity.
  • Key mechanisms include enhanced skeletal muscle blood flow and mitochondrial biogenesis/oxidative function.
  • The findings underscore the importance of considering antibiotic use in athletes and its potential impact on performance.