肥胖和非肥胖男孩在热环境中骑行的反应。
Responses of obese and non-obese boys cycling in the heat.
机构信息
School of Physical Education, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil.
出版信息
Int J Sports Med. 2012 Jun;33(6):497-501. doi: 10.1055/s-0031-1301314. Epub 2012 Feb 29.
This study compared rectal temperature (Tre), heat sensation and sweating between obese and non-obese boys during cycling in the heat. Participants (aged 12-15 years) were 17 obese and 16 non-obese (BMI=29.4±4.3 and 16.8±1.7 kg · m⁻², respectively) boys. They cycled for 30-min (50-55% VO(2peak)) in a climatic chamber (35°C, 45% RH) and Tre, heat sensation and sweat volume were monitored. From the start to the end of cycling, Tre was similar between the obese (37.4±0.3-37.8±0.3°C) and non-obese (37.3±0.2-37.9±0.2°C) groups. Heat sensation was higher in the obese group from the start (3.6±2.7 vs. 1.3±1.4 cm; P=0.008) to the end (7.6±2 vs. 5.2±2.2 cm; P=0.003) of cycling. Sweat volume corrected by body surface area was similar between the obese (200±123 mL · m⁻²) and non-obese (212±80 mL · m⁻²) groups. Initial and final HR were similar in both groups, and RPE was higher in the obese group at 25th (P=0.040) and 30th (P=0.019) min. In conclusion, the obese pubescent participants presented similar Tre and sweating volume, but higher heat sensation while cycling in the heat.
本研究比较了肥胖和非肥胖男孩在热环境中骑自行车时直肠温度（Tre）、热感觉和出汗情况。参与者（年龄 12-15 岁）包括 17 名肥胖男孩和 16 名非肥胖男孩（BMI 分别为 29.4±4.3 和 16.8±1.7 kg·m⁻²）。他们在气候室（35°C，45%RH）中骑行 30 分钟（50-55%VO(2peak)），并监测 Tre、热感觉和出汗量。从开始到结束骑行，肥胖组（37.4±0.3-37.8±0.3°C）和非肥胖组（37.3±0.2-37.9±0.2°C）的 Tre 相似。从开始（3.6±2.7 对 1.3±1.4 cm；P=0.008）到结束（7.6±2 对 5.2±2.2 cm；P=0.003），肥胖组的热感觉更高。通过体表面积校正的汗液量在肥胖组（200±123 mL·m⁻²）和非肥胖组（212±80 mL·m⁻²）之间相似。两组的初始和最终 HR 相似，肥胖组在 25 分钟（P=0.040）和 30 分钟（P=0.019）时的 RPE 更高。结论：在热环境中骑自行车时，肥胖青春期参与者的 Tre 和出汗量相似，但热感觉更高。
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