Cardiovascular adaptations to 10 days of cycle exercise

Constance M. Mier, Michael J. Turner, Ali A. Ehsani, and Robert J. Spina Section of Applied Physiology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri 63110 Received 18 November 1996; accepted in final form 23 July 1997. Mier, Constance M., Michael J. Turner, Ali A. Ehsani, and Robert J. Spina. Cardiovascular adaptations to 10 days of cycle exercise. J. Appl. Physiol. 83(6): 1900-1906, 1997. We hypothesized that 10 days of training would enhance cardiac output (CO) and stroke volume (SV) during peak exercise and increase the inotropic response to -adrenergic stimulation. Ten subjects [age 26 ± 2 (SE) yr] trained on a cycle ergometer for 10 days. At peak exercise, training increased O 2 uptake, CO, and SV ( P