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題名 | 不同環境溫度與運動強度對皮膚血流調控之影響=The Influence of Environmental Temperature and Exercise Intensity on Skin Blood Flow |
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作者 | 羅元鴻; | 書刊名 | 高苑學報 |
卷期 | 11 民94.07 |
頁次 | 頁413-424 |
分類號 | 528.9012 |
關鍵詞 | 環境溫度; 運動強度; 皮膚血流量; Environmental temperature; Exercise intensity; Skin blood flow; |
語文 | 中文(Chinese) |
中文摘要 | 皮膚的血液循環是人體調節體溫的主要方法,體溫過高會干擾體內自穩態的平衡,並導致局部疲勞,在動態運動中會有一連串心血管循環調節反應,以維持運動肌群適當的血液滲透與血壓,考量台灣冬冷夏熱且南北溫差頗大,因此本研究的目的是要探討不同的環境溫度與運動強度對皮膚血流反應變化的影響。十位一般健康男性大學生自願參與研究,以雷射都卜勒血流計量測皮膚血流量,以便攜式能量代謝分析系統、Polar心跳紀錄器與電動腳踏車測功器來測量個體在大有氧運動能力(VO2peak),並轉換為40%VO2peak與60%VO2peak兩種強度,而環境溫度則是以人工環境控制室來模擬常溫22℃與熱溫35℃(相對溼度50% RH)的環境,收集不同環境溫度與運動強度中前臂與大腿皮膚血流量,並以平均數±標準差來表示,所得數據以重複量數多因子變異數分析探討其變化主要影響因子。結果顯示:在運動前期(運動開始至第十五分鐘)熱溫環境中皮膚血流量顯著較常溫為高,而在運動後期(運動持續十五分鐘至第三十分鐘運動停止),熱溫環境與高強度運動情境之皮膚血流量顯著高於常溫環境與低強度運動,此外人體動態踏車運動中前臂與大腿皮膚血流量之變化趨勢不同,且接近最大衰竭時似乎會有皮膚血管收縮的現象,而會有降低的皮膚血流量。本研究結論為:運動初期外在環境溫度會顯著影響人體皮膚血流量,然而在運動後期皮膚血流量之變化則主要是受運動強度來影響,此外皮膚血流不同增幅程度顯示上肢前臂皮膚血流對體熱之調節與散失扮演較顯著的作用。 |
英文摘要 | Skin blood flow is the major system to modulate human temperature. Hyperthermia will interfere the hemostasis and result in local fatigue. Dynamic exercise also will cause a serious of cardiovascular regulation. These reactions mainly for maintain proper muscle perfusion and blood pressure. Consideration of the specific weather in Taiwan, it is meaningful to examine the influence of different environment temperature and exercise intensity on skin blood flow. Ten healthy college male students were recruited as subjects. Skin blood flow was measured by a Laser Doppler flowmetry on forearm and thigh. Cortex MetaMax and Polar heart monitor were used to measured subjects’ VO2peak. Environment temperature was under control at 22℃ and 34℃ by Walk-in Chamber. Exercise intensity was set at 40%VO2peak and 60%VO2peak, which according to the regression formula derive from VO2peak. Repeated-measure MANOVA was used to analyze the difference between each testing condition. Results showed that: (1) In the early stage of exercise testing, the skin blood flow was significantly higher in hot environment temperature that in neutral environment temperature. (2) In the late stage, the skin blood flow was significantly higher in hot environment temperature & high exercise intensity that in neutral environment temperature & normal exercise intensity. (3) The tendency of changing in forearm and thigh skin blood flow was dissimilar during dynamic exercise. The skin blood flow seemed to attenuate when approach the exhaustion. It is concluded that environment temperature will significant influence the skin blood flow in the early stage of exercise. But in the later stage of exercise, exercise intensity is the mainly factor to influence the skin blood flow. The difference of raise-margin indicted that forearm skin blood flow play more remarkable action to moderate human temperature. |
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