Articles : Response to Cardiorespiratory Function and Upper Body Muscle Fatigue during Maximal Arm Ergometer Exercise in obese middle-School Students

Journal of Exercise Nutrition & Biochemistry 2002;6(3):231-238.

Abstract

The purpose of this experiment was to investigate the cardiorespiratory function and upper body muscle fatigue in obese middle-school students, and to compare these variables with normal weight students. Six obese middle-school group (mean±SD, age; 14.0±63yrs, body fat; 9.9±2.3) and six control group(mean±SD, age; 14.3±51yrs, body fat; 25.1±4.5) were participated in this study. All subjects completed 2-min stage graded maximal arm cycle ergometer exercise, with exercise intensity increased 10watts every 2 minutes. During this test, cardiorespiratory function (exercise time, peak V O_(２), peak herat rate, ventilation threshold) and muscle fatigue (MPF) from trieps brachii and pertoralis major were analyzed by auto gas analyzer and ENG respectively. An alpha level of .05 was used as the criteria for significance. The following results were observed. 1. Exercise time was significantly higher in obese group than control group. 2. There was no significant difference between two groups over the mean values of peak V O_(２), 3. Peak heart rate was significantly higher in obese group than control group. 4. There was no significant difference between two groups over the mean values of V O_(２) at ventilation threshold (VT). 5. Muscle fatigue (MPF) from triceps brachii and pectoralis major was significantly higher in obese group control group. In conclusion, these results are showing that the cardiorespiratory response during an arm cycling exercise is not different between obese middle-school group and normal weight group, but the muscle fatigue of triceps brachii and pectoralis in obese middle-school group was higher than that of normal weight group.

Key Words: muscle fatigue, arm ergometer, obese, cardiorespiratory function