Fig. 7.

Effect of moderate-endurance exercise training on cardiac chamber fibrosis. Exercise training did not alter cardiac chamber fibrosis because the amount of fibrosis was similar in both the sedentary and exercise-trained animals. A: representative histological sections for each cardiac chamber from one exercise-trained and one sedentary animal. B: composite data for the exercise-trained (n = 5) and sedentary animals (n = 6). RA, right atrium; LA, left atrium; RV, right ventricle; LV, left ventricle.