The effect of high intensity interval training and circuit resistance training on respiratory function and body composition in overweight females

In the present study two types of endurance training as, high intensity interval training and circuit resistance training on pulmonary function and body composition were studied among some overweight females.
In this research forty-five qualified females volunteered and were randomly divided into three groups including circuit resistance, high-intensity interval and control groups. Subjects in the training group were trained for 8 weeks with 3 time intervals. The resistance group practiced 2 circles, each consisting of 7 stations; each station included 2 sets of 8-15 repetitions, with an intensity of 65-85% 1RM. In the interval group subjects performed training at intensity of 85-95% of maximum heart rate with 8-11 repetitions including 2 minutes running and 2 minutes active resting time between intervals (30-40% HRmax). Before and after the end of the training sessions,spirometry, body composition, muscular strength and endurance and VO2max were taken. Data were analyzed byone-way ANOVA, LSD post hoc and dependent t-test.
The results showed no significant difference between study groups concerning forced expiratory volume (FEV1), force vital capacity (FVC), FEV /FVC, forced expiratory flow 25-75% (FEF25-75%), body weight, body mass index and wait to hip ratio (p The results of the present study suggest that training with period of intensity interval training and circuit resistance, do not affect on most dynamic respiratory indices, but it seems that resistance training have been the more improving in FVC and on some of the indicators of body composition in overweight females.