Short-Term Physical Training Improves Vasodilatory Capacity in Cardiac Patients.

Abstract

SUMMARYThere have been no previous studies that clearly demonstrate the effects of training on the relation between exercise capacity and vasodilatory capacity in skeletal muscle. This study was performed to clarify the effects of short-term, moderate-intensity physical training on exercise tolerance and vasodilatory capacity in cardiac patients.We studied 21 patients after acute myocardial infarction, coronary artery bypass grafting, or valve replacement. Each patient performed symptom-limited incremental exercise tests before and after a 2-week training program of moderate-intensity exercise. A cycle ergometer was used for both the training and exercise tests. Blood pressure measurement and respiratory gas analysis were continuously performed during the tests. Cardiac output was also measured using a dye-dilution method at rest and every 2 minutes during incremental exercise. Reactive hyperemic calf blood flow was measured at rest.After the training program, the subjects attained a significant decrease in systemic vessel resistance and significant increases in oxygen uptake and cardiac output at peak exercise. Changes in reactive hyperemic calf blood flow were significantly correlated with the changes in cardiac output, systemic vascular resistance, and the kinetics of oxygen uptake during warm-up exercise.By improving the peripheral vasodilatory capacity in these patients, short-term, moderate-intensity physical training was found to improve the cardiovascular adaptation not only at peak exercise, but also during the onset of exercise. (Jpn Heart J 2002; 43: 13-24)

The exercise training effects of skeletal muscle strength and muscle volume to improve functional capacity in patients with myocardial infarction

“…AT and peak VO 2 were significantly improved, which was the similar results as previous reports without cardiac or orthopedic complications [5,8]. Many study reports have suggested the necessity of exercise training which improves exercise capacity in patients with cardiac disease [4][5][6][7][8]14,15]. In addition, exercise capacity was significantly improved both in the L and H groups.…”

A predictor of aerobic threshold for patients with heart failure with reduced ejection fraction

“…These previously described results suggest that there are several complex mechanisms underlying complementation in human physical fitness. Cardiac dysfunction can be improved by cardiac rehabilitation because oxygen conveyance is associated with cardiac output, expansion of blood vessels 14 ) , and blood pressure; however, this does not improve LVEF. Furthermore, we expected that participants with HFpEF would show increased myocardial oxygen consumption because of retraction during exercise below the AT.…”

Functional Capacity, Skeletal Muscle Strength, and Skeletal Muscle Volume in Patients With Myocardial Infarction

“…Few studies, however, have sought to clarify how reduced exercise capacity relates to reductions in central • • factors such as cardiac output, left ventricular ejection fraction, and lung function. 28,29) While some reports have confirmed correlations between exercise capacity and blood flow and skeletal muscle metabolism, 12,14) none have actually measured skeletal muscle volume and strength to determine how these 2 parameters correlate with exercise capacity or with each other. This study investigated the influence of skeletal muscle volume on exercise capacity in a relatively large population of patients with MI using bioelectricity impedance, a new method for measuring skeletal muscle volume.…”