Key result
Whole body exercises consistently resulted in higher cardiopulmonary stress and dyspnea than arm cranking and resistance training in patients with COPD.
Why the study?
Does the modality of exercise training affect cardiopulmonary stress and symptoms in patients with COPD?
Observational (n=11)
Does the modality of exercise training affect cardiopulmonary stress and symptoms in patients with COPD?
In COPD patients, whole-body exercise induces higher cardiopulmonary stress and dyspnea compared to resistance training, though standard guideline-based exercise testing achieves recommended training intensities.
May favor arm or resistance training to limit dyspnea in COPD rehab; leaves open effects on adherence and long-term outcomes.
Exercise training is an essential component of pulmonary rehabilitation. However, the cardiopulmonary stress imposed during different modalities of exercise training is not yet known. In the present study, the cardiopulmonary stress of a 12-week exercise training programme in 11 chronic obstructive pulmonary disease (COPD) patients (forced expiratory volume in one second 42+/-12%pred, age 69+/-6 yrs) was measured. Pulmonary gas exchange and cardiac frequency (f(C)) of three training sessions were measured with a portable metabolic system at the beginning, mid-term and end of the programme. Symptoms were assessed with Borg scores. The exercise intensity was compared with the recommendations for exercise training by the American College of Sports Medicine (ACSM). Training effects were significant (maximum change in work: 14+/-11 Watts, 6-min walk test: 44+/-36 m). Whole body exercises (cycling, walking and stair climbing) consistently resulted in higher cardiopulmonary stress (oxygen uptake (V'(O(2))), minute ventilation and f(C)) than arm cranking and resistance training. Dyspnoea was higher during cycling than resistance training. Patients exercised for >70% (>20 min) of the total exercise time at >40% of the V'(O(2)) reserve and f(C) reserve ("moderate" intensity according to the ACSM) throughout the programme. The cardiopulmonary stress resistance training is lower than during whole-body exercise and results in fewer symptoms. In addition, exercise testing based on guidelines using a fixed percentage of baseline peak performance and symptom scores achieves and sustains training intensities recommended according to the American College of Sports Medicine.
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Probst et al. (2006) conducted an observational in chronic obstructive pulmonary disease (COPD) (n=11). Whole body exercises (cycling, walking, stair climbing) vs. Arm cranking and resistance training was evaluated on Cardiopulmonary stress (oxygen uptake, minute ventilation, cardiac frequency) and symptoms. Whole body exercises consistently resulted in higher cardiopulmonary stress and dyspnea than arm cranking and resistance training in patients with COPD.
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