Effects of endurance exercise training on muscle microvascular functional indexes in training compared with nontraining patients. (A) Percentage change in CD × CSA in training and nontraining groups. CD × CSA increased in training patients compared with nontraining patients. (B) Percentage change in CD × CSA × Hb in training and nontraining groups. CD × CSA × Hb increased in training patients compared with nontraining patients. Statistically different between the 2 groups: *P < .05.