부산대학교 도서관

The 3-min step test is the popularly used method to evaluate cardiopulmonary fitness, however, whether this method could be affected by ambient temperature and water intake is unclear. The purpose of this study was to examine the effect of ambient temperature and water intake on cardiopulmonary fitness and stress response after 3-min step test in college male Judo athlete. Twelve (12) college Judo athletes (aged 19.5±0.3 year, body weight 73.3±2.5 kg) were recruited for this study. All Subjects performed 3-min step test (96 steps/min) following four treatments including, without water intake at 20℃(LT) and 32℃ (HT), and with water intake at 20℃ (LT-drink) and 32℃ (HT-drink). The heart rate data and blood sample were collected immediately and during recovery (1min 30s, 2min 30s, and 3min 30s) after 3-min step test for evaluating the cardiopulmonary fitness, blood lactate and cortisol levels. The lactate level was significantly increased in all treatments after 3-min step test, but the lactate level of LT-drink treatment was significantly lowered than HT-drink treatment. Athletes with LT-drink treatment exhibited higher cardiopulmonary fitness index than in HT-drink and HT treatments following 3-min step test. The level of cortisol in all treatments was not significantly altered after 3-min step test. The current study showed that athletes perform 3-min step test at lower ambient temperature could accelerate the recovery of heart rate. This data suggests that environmental condition, such as temperature is a considerable factor to estimate the cardiopulmonary fitness in Judo athletes.