Cardiorespiratory responses in different types of squats and frequencies of Whole-Body Vibration in patients with Chronic Obstructive Pulmonary Disease.

This study aims to investigate the cardiorespiratory responses to different vibration frequencies to characterize the intensity of exercise, as well as to compare the effect of two types of squatting exercises (static and dynamic) on the Whole-Body Vibration (WBV) exercise in individuals with chronic obstructive pulmonary disease (COPD). Twenty-six subjects were divided and paired into healthy and COPD groups that performed static squatting associated with WBV (frequencies: 30, 35 and 40 Hz; amplitude: 2 mm) and dynamic squatting associated with WBV (frequency: 35 Hz; amplitude 2 mm) on a vertical vibration platform. Oxygen consumption (VO2), heart rate (HR), minute ventilation (VE), ratio of minute ventilation to oxygen production (VE/VO2) ratio of minute ventilation to carbon dioxide production (VE/VCO2), oxygen saturation and rating of perceived exertion (RPE) were measured. For both groups, there was a decrease in VE/VO2 and VE/VCO2 ratios during static and dynamic squats, as well as an increase in other cardiorespiratory parameters, and no significant difference existed between them. There was an effect of the type of squat on the HR variation; the values in the static squat were higher than those of the dynamic squat in both groups. A significant difference with a reduction in SPO2 at 40 Hz frequency when compared to 30 Hz in the COPD group. The other variables behaved similarly between the frequencies. The WBV exercise, regardless of the frequencies used, represented a mild effort that promoted cardiorespiratory response in COPD, with greater responses in the static squat and no adverse effect.

KEYWORDS: lung disease; metabolic equivalent; oxygen consumption; vibration exercise

PMID: 30359538 DOI: 10.1152/japplphysiol.00406.2018