Monchai Chottidao. Effects of exercise with different thoracic restriction on respiratory performance in Thai athletes . Master's Degree(Sports Science). Mahidol University. : Mahidol University, 2005.
Effects of exercise with different thoracic restriction on respiratory performance in Thai athletes
Abstract:
The purpose of this study was to investigate ventilatory responses and adaptations to exercise training with different thoracic restriction. Thirty-eight healthy males, aged 18-22 years, were randomly assigned to one of five experimented groups; chest-strapping group (CS), chest non-strapping group (CN), sedentary group (SE), aerobic exercise group (AE) and aquatic exercise group (AQ). In exercised groups, subjects underwent exercises either static aerobic dance or aquatic exercise at the same intensity (70-80% MHR), frequency (3 time/week) and duration (40-50 min) for 4 weeks. Data collection included anthropometrics measurement (body weight, height, body mass index and circumference of chest) and physical fitness (HR and VO2 max) before and after exercise training program. Respiratory functions include lung volume and flow (FVC, FEV1.0, FEV1.0/FVC, FIVC, PEFR, MVV, MVT, RR and VC) were also measured each week during training periods. The results showed that maximal voluntary ventilation in CS group was significantly higher than CN group at 4th week of training. CN group had significantly lower levels of MVT at 2nd and 3rd of training period compared with CS group. Respiratory rate of CS subjects were significantly lower than in CN group. MVT was higher during 2nd, 3rd and 4th week of training (p<0.05) in AQ group than in AE group. Whereas, respiratory rate of AQ group was significantly lower than that of AE group.
In conclusion, exercise to improved pulmonary functions. Chest restriction of exercise increased the strength and endurance of respiratory muscles by increasing MVV and MVT while decreasing in RR. A longer exercise training period, greater elastic strapping in other methods and greater intensity loading on the chest, and different sports and gender groups are recommended for future research.