Walking performance and economy in chronic heart failure patients pre and post exercise training |
| |
Authors: | Ralph Beneke and Katharina Meyer |
| |
Institution: | (1) Institut für Sportmedizin, Clinic Benjamin Franklin, Free University Berlin, Clayallee 229, D-14195 Berlin Germany, DE;(2) Herz-Zentrum Bad Krozingen, Germany, DE |
| |
Abstract: | The effect of a 3-week exercise programme on performance and economy of walking was analysed in 16 male patients with chronic
heart failure mean age 51.8 (SD 6.9) years, height 174.9 (SD 6.3) cm, body mass 75.3 (SD 11.5) kg, ejection fraction 20.8
(SD 5.0)%]. They were submitted to a cardiopulmonary exercise test on a cycle ergometer and a 6-min walking test on a treadmill
before and after the period of exercise training. The training programme consisted of interval cycle (five times a week for
15 min), and treadmill ergometer training (three times a week for 10 min) at approximately 70% cycling peak oxygen uptake
(O2peak) and supplementary exercises (three times a week for 20 min). Compared to the pre values cycling O2peak 11.9 (SD 2.9) vs 14.0 (SD 2.3) ml · kg–1 · min–1], maximal self paced walking speed 0.68 (SD 0.33) vs 1.16 (SD 0.30) m · s–1], and net walking power 2.16 (SD 0.89) vs 2.73 (SD 0.91) W · kg–1] had increased (P < 0.01) while net energy cost 3.31 (SD 0.66) vs 2.33 (SD 0.38) J · kg–1 · m–1] had decreased (P < 0.001) after the training period. Approximately 42% of the increase of walking speed resulted from a higher walking power
output, whereas approximately 58% corresponded to a positive effect on walking economy. The improvement in walking economy
was a function of an increase in walking velocity itself and a result of a more efficient walking technique. These results
would indicate that in patients with marked exercise intolerance, adequate exercise training programmes could contribute to
favourable metabolic changes with positive effects on the economy of motion.
Accepted: 29 August 1996 |
| |
Keywords: | Walking test Metabolic power Energy cost Exercise training Chronic heart failure |
本文献已被 SpringerLink 等数据库收录! |
|