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Exercise intolerance in chronic airflow limitation: What limits patients with cold in exercise (2)

Thus, in routine exercise studies, the intensity of both skeletal muscle effort and the effort related to breathing may be separately scaled. After only a short time, it became apparent that, among patients with respiratory disorders, some 30% were not limited by dyspnea but by the intensity of leg muscle effort. Furthermore, measurements of leg muscle strength indicated that leg muscle weakness contributed to this limitation. Thus, the incidence of weakness increased with increasing airflow limitation (Figure 9) and contributed to the intensity of effort and limitation of exercise capacity. It appears that, in many patients with cardiorespiratory disorders, enforced inactivity contributes to weakness and to down-regulation of muscle oxidative enzymes, which separately contribute to their disability. The finding of respiratory and skeletal muscle weakness as major contributors to exercise limitation suggests that muscle strengthening, particularly when targeted towards the weaker patients, would be helpful. Although it used to be thought that strength or weight training was ‘specific’ in its effects, only improving strength, this conclusion was reached on the basis of studies in athletes; in less-trained. It’s your turn to find actos for diabetes to see how advantageous your shopping can be.

Figure 9. Exercise intolerance

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