| Summary: | 碩士 === 臺北市立大學 === 運動健康科學系碩士班 === 107 === Purpose: this study was to comparison of physiologic responses in exercise with training mask and hypoxic environment. Methods: Nine healthy male and female college students (age: 21.7 ± 0.8 years, height: 166.3 ± 9.9 cm, body weight: 62.9 ± 10.2 kg) were recruited in this study. All participants performed the cycling time trial in following three conditions: normal oxygen environment, training mask (~2133 m) and normobaric hypoxic environment (~2000 m). Each trial was conducted following one week washout period. The exercise challenge was based on the cycling time trial (achieve the personal calorie consumption of 70% Wmax, about 25 minutes). The body composition and VO2max were measured before each trial conducted. The heart rate, SpO2, PRE, complete time, riding distance, and calorie consumption were recorded during the cycling time trial in three different environments. The blood lactate was collected in pre and post exercise. Results: The total riding time in normal oxygen environment was significantly lower in training mask and normobaric hypoxic environments; however, the heart rate in normal oxygen environment was significantly higher than normobaric hypoxic environments after exercise. The blood oxygen saturation in normal oxygen environment is significantly higher than training mask and normobaric hypoxic environment; in addition, the blood oxygen saturation in training mask was significantly higher than in normobaric hypoxic environment. In terms of RPE during exercise, the training mask trial is significantly higher than normal oxygen environment and normobaric hypoxic environment. Compared to normobaric hypoxic condition, the blood lactate level following exercise was significantly lower in normal oxygen environment. Moreover, there was no difference in blood lactate level after exercise between training mask and the normobaric hypoxic trials. Conclusions: Our study found that exercise with training mask could not simulate the change of physiological response (blood oxygen saturation, blood lactate and heart rate) in exercise under normobaric hypoxic condition
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