Unadjusted scatterplot of alpha diversity (e.g., Chao1, Observed
Species, PD Whole Tree, and Shannon) and percent of age-predicted maximal heart
rate (%HRmax) during Stage 3 of the graded exercise test. Mean
intensity corresponded to 70 +/− 10% %HRmax. Note the tendency
for greater aerobic fitness, evidenced by lower %HRmax associated
with higher alpha diversity. Groups are dichotomized by VO2peak above
and below 22.4
mLO2·kg−1·min-1.
n = 37.