Fig. 3From: Modulating effects of exercise training regimen on skeletal muscle properties in female polo poniesHistochemical staining of gluteus medius muscle from polo ponies at L period. a SDH staining shows the dark-purple color that marks oxidative enzyme activity. b Oil red O staining shows the lipid droplet (red color) within the muscle fiber. c PAS Schiff reagent staining shows the red-purple color of the glycogen rich fiber. Scale bars = 50 μmBack to article page