肥胖者與非肥胖者於漸增負荷運動中心血管與體溫調節反應之比較研究

Thermoregulation and Cardiovascular Responsein Nonobese and Obese individuals during Incremental Exercise

10.6222/pej.0023.199709.3123

黃新作(Huang Shin Tho)；黎俊彥(Lee Juen Yen)

心血管反應 ； 體溫調節反應 ； 漸增負荷運動 ； 身體組成 ； cardiovascular response ； thermoregulation response ； incremental exercise ； body composition

體育學報

23期（1997 / 09 / 01）

261 - 273

繁體中文

Body composition can be divided into two components: 1. body fat, and 2. lean body mas or fat-free weight. The increase in cardiac output during exercise must satisfy both the nutritional requirements of working muscle and body's thermoregulatory requirement, in order to maintain a constant internal temperature by increasing blood flow to the skin. Since fat has a lower specific heat and contain less water, and more fat just like insulation will reduce heat exchange by radiation and evaporation. Seven obese (%body fat＞25%) and seven Nonobese (%body fat＜20%) healthy, male college students, was recruited as study subjects, performed upright incremental bichcle ergometer test, to investigated differences among obese and Nonobese in heart rate, blood pressure, skin temperature, core temperature, VO2peak, and skin blood flow during exercise. Data analyzed using the SPSS/Windows statistical software package. Statistical significant is set at α=0.05. The present result showed that during incremental exercise: 1. The Nonobese had significantly higher VO2peak compared with the obese. The obese had higher cardiovascular response, but no statistically significant difference; 2. No significantly differences between the two groups were found in skin temperature, but the ovese had significantly higher core temperature compared with the Nonobese. The Nonobese had significantly higher skin blood flow compared with the obese, suggested that the Nonobese had better thermoregulation function than obese.

Body composition can be divided into two components: 1. body fat, and 2. lean body mas or fat-free weight. The increase in cardiac output during exercise must satisfy both the nutritional requirements of working muscle and body's thermoregulatory requirement, in order to maintain a constant internal temperature by increasing blood flow to the skin. Since fat has a lower specific heat and contain less water, and more fat just like insulation will reduce heat exchange by radiation and evaporation. Seven obese (%body fat＞25%) and seven Nonobese (%body fat＜20%) healthy, male college students, was recruited as study subjects, performed upright incremental bichcle ergometer test, to investigated differences among obese and Nonobese in heart rate, blood pressure, skin temperature, core temperature, VO2peak, and skin blood flow during exercise. Data analyzed using the SPSS/Windows statistical software package. Statistical significant is set at α=0.05. The present result showed that during incremental exercise: 1. The Nonobese had significantly higher VO2peak compared with the obese. The obese had higher cardiovascular response, but no statistically significant difference; 2. No significantly differences between the two groups were found in skin temperature, but the ovese had significantly higher core temperature compared with the Nonobese. The Nonobese had significantly higher skin blood flow compared with the obese, suggested that the Nonobese had better thermoregulation function than obese.