Cardiorespiratory fitness may be a far greater predictor of gut microbiota diversity than either body fat percentage or general physical activity
www.sciencedaily.com
From the article:
Participants performed a graded exercise test to estimate peak cardiorespiratory fitness, assessments of total energy expenditure and examination of gut microbiota from faecal swipes. The results showed that participants with the higher cardiorespiratory fitness had significantly greater gut microbiota diversity compared to less fit participants.