Abstract
Although the relationship between aerobic types of exercise and exercise-induced bronchospasm (EIB) has already been well established, the influence of anaerobic exercise on EIB is still unknown.
The purpose of this study was to compaire the influence of aerobic exercise with that of intermittent anaerobic exercise on EIB in asthmatic children.
Seven children with bronchial asthma participated in this study. The subjects underwent an incremental anaerobic exercise test to determine their maximal anaerobic power (Pmax) with a high power cycle ergometer. Each subject then underwent an anaerobic EIB tests which was 10 repetitions of 10 seconds anaerobic exercise with intervals of two minutes. Exercise intensity was 60%, 80% and 90% of Pmax respectively. They also performed an aerobic EIB test for 6 min by standard method.
The results were follows.
1. The average maximal anaerobic power (Pmax) was 473.2±131.1 watt. The avarage rpm. and torque at Pmax were 100.8±5.8 rpm and 4.6±1.3 kp respectively.
2. There was no significant difference in total work between aerobic exercise and 80% Pmax and 90% Pmax of anaerobic test.
3. Minute ventilation was significantly lower during intermittent anaerobic exercise tests compaird with aerobic exercise test.
4. Max % fall in FEV1.0 in aerobic exercise test was 21.8±13.1%. All of subjects did not show a fall in FEV1.0 more than 10% after intermittent anaerobic exercise tests.
Based on these results, it was concluded that intermittent anaerobic exercise was safer than aerobic exercise.
Therefore, intermittent anaerobic exercise training may be recommended to asthmatic children.
