Effect of intestinal microbiota on exercise performance in mice

Area of Science:

• Exercise physiology
• Microbiome research
• Sports science

Background:

• The antioxidant enzyme system protects against exercise-induced oxidative stress.
• Intestinal microbiota is increasingly recognized as a factor in host metabolism and physiology.
• Limited data exists on the gut microbiota's impact on athletic performance and fatigue.

Purpose of the Study:

• To investigate the association between gut microbial status and exercise performance.
• To explore the role of specific bacteria, such as Bacteroides fragilis, in physical endurance.
• To examine the relationship between gut microbiota and the antioxidant enzyme system in mice.

Main Methods:

• Comparison of exercise performance (endurance swimming time) in specific pathogen-free (SPF), germ-free (GF), and Bacteroides fragilis (BF) gnotobiotic mice.
• Measurement of organ weights (liver, muscle, adipose, fat pads).
• Analysis of serum and hepatic antioxidant enzyme levels (glutathione peroxidase, catalase, superoxide dismutase).

Main Results:

• SPF and BF mice exhibited longer endurance swimming times compared to GF mice.
• SPF and BF mice had higher organ weights (liver, muscle, adipose, fat pads) than GF mice.
• Serum glutathione peroxidase and catalase levels were higher in SPF mice than GF mice; hepatic glutathione peroxidase was higher in SPF than GF and BF mice.

Conclusions:

• Gut microbial status significantly impacts exercise performance.
• The gut microbiota may influence physical status through its interaction with the antioxidant enzyme system.
• Targeting gut bacteria could be a potential strategy to enhance athletic performance.