Additional file 4: of Cardiorespiratory fitness as a predictor of intestinal microbial diversity and distinct metagenomic functions

Predictor variables included in the RDA models. A manual pre-screening of dietary variables based on existing literature and categories of interest was initially carried. Next, a combination of “both” forward and backward stepwise inclusion selection method using vegan’s ordistep function was used on the remaining 23 variables plus VO2peak, Sex, BMI, and Age. (TIF 240 kb)