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  • Title: [Cardiorespiratory function in young bronchitis patients, mostly mineworkers, before and after kinesitherapy and exertion training. Comparison with a control group (Preliminary results)].
    Author: Marcq M, Minette A.
    Journal: Rev Inst Hyg Mines (Hasselt); 1981; 36(1):5-31. PubMed ID: 7280468.
    Abstract:
    We have studied the effects of respiratory physiotherapy and physical training on the cardiopulmonary function of patients with early chronic bronchitis and broncho-obstruction presumably at the beginning stages. The trained group was compared with a control group who was treated with infra-red rays on the thorax. Both groups were treated during four weeks. All patients were less than 50 years old and all were smokers. They complained of dyspnea on exertion (stage 2 ECCS), cough and expectoration for at least one year. Their spirometry and airway resistance values were normal or near normal but at least two of the following functional indices were altered in all: the He residual volume, the slope of N2 phase III and/or the He bolus phase IV. In the trained group, functional indices of central or peripheral airway obstruction did not change after the four weeks of treatment. On the contrary, the slow vital capacity (SVC) and the peak expiratory flow (PEF), which are presumably more influenced by the force of respiratory muscles, were significantly increased after respiratory rehabilitation. During steady-state exercise of moderate intensity 1.) a slight increase of pH (P less than 0.1 at a VO2 of 1.5 l/min and 1.75 l/min), perhaps due to a lessened lactacidemia, 2.) a decrease in ventilation (VE) (P less than 0.1 at a VO2 of 1.25 l/min) and 3.) a reduction in the alveolo-arterial gradient (AaDO2) (P less than 0.1 at a VO2 of 1.25 l/min) were observed. In the control group there was no change of respiratory functional indices at rest or during exercise after treatment. The reduction of AaDO2 observed in the trained group could be due to an improvement of pulmonary gas exchange. This was small, however, and probably without clinical significance. We believe that the improvement of dyspnea noted in the trained group could be due to the increase in ventilatory performance (SVC, PEF and VE) and to a better O2 extraction in the peripheral muscles.
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