THERMAL RESPONSES TO SWIMMING : THE INFLUENCE OF LONG SWIMSUITS

目的：本研究的目的是阐明穿着新型长型泳衣（BODYSUITS）在长时间游泳时的热效应。方法：我们尝试使用一种新的小型温度记录仪测量游泳时的皮肤温度。记录仪有三个功能（传感器，2040数据点存储器，内置电源：温度记录仪3650，HIOKI，日本）。研究对象为12名男性大学生竞技游泳运动员，年龄20.2±1.3岁，身高174.0±6.4 cm，体重69.1±7.7 kg，脂肪率17.7±3.1%。所有受试者每天训练2-3小时，每周训练5-7次。受试者在30.15℃和28.90℃的水温条件下，穿着两种竞技泳装，以最大努力游1500米。温度记录仪安装在游泳者的小腿、大腿、腹部、胸部和前臂。在整个游泳过程中，每隔一分钟测量一次皮肤温度。在游泳结束时测量体温（口腔：Tb）、感知用力等级（RPE）、头部和身体的感知热感觉（TSH） （TSB）。结果：BODYSUITS与普通泳衣的Tb值（37.4±0.2、37.2±0.2℃）差异无统计学意义。BODYSUITS和普通泳衣游泳时的平均皮肤温度分别为33.0±0.38℃和32.6±0.35℃（p<0.05）。长泳裤与普通泳裤TSB（6.5±0.8,5.6±>0.2）和TSH（7.1±0.3,5.9±0.6）差异有统计学意义（p<0.05）。在30.15℃的水温下，BODYSUIT游泳时的平均皮肤温度较高。结论：在水温较高（30℃左右）时，穿着BODYSUITS游泳的热反应明显高于穿着普通泳衣游泳的热反应。因此，游泳者可能需要更加注意在温暖的水环境中长时间/高强度游泳时穿着BODYSUITS的后果。

PURPOSE : The purpose of this study was to clarify the thermal effect of wearing the new long type swimsuits (BODYSUITS) during prolonged swimming. METHODS : We tried to measure the skin temperature during swimming using a new small temperature logger. The logger which has three functions (sensor, 2040 data point memory, built-in power : Temperature logger 3650, HIOKI, Japan). The subjects were 12 male college competitive swimmers aged 20.2±1.3 yr, height 174.0±6.4 cm, body weight 69.1±7.7 kg, %Fat 17.7±3.1 %. All the subjects trained regularly for 2-3 hours a day, 5-7 times a week. The subjects swam 1500 m at maximum effort in a front crawl stroke with two types of competitive swimsuits in water temperatures of 30.15℃ and 28.90℃. The temperature loggers were attached to the swimmer's calf, thigh, abdomen, chest, and forearm. Those skin temperatures were measured throughout the swim at one minute intervals. Body temperature (oral : Tb), rating of perceived exertion (RPE), and perceived thermal sensation of the head (TSH) and body (TSB) were measured on completion of the swim. RESULTS : There were no significant differences in Tb (37.4±0.2, 37.2±0.2℃) for the BODYSUITS and regular swimsuits, respectively. The mean skin temperatures during the swim for the BODYSUITS and regular swimsuits were 33.0±0.38 and 32.6±0.35℃, respectively (p<0.05). There were significant differences in TSB (6.5±0.8, 5.6±>0.2) and TSH (7.1±0.3, 5.9±0.6) for the long and regular swimsuits, respectively (p<0.05). The mean skin temperature during the swim for BODYSUIT were higher in the water temperature of 30.15℃. CONCLUSION : The thermal responses to swimming wearing the BODYSUITS were significantly higher than wearing the regular swimsuits in the water temperature high (around 30℃). Therefore, swimmers might be required to pay more attention to the consequences of wearing the BODYSUITS during prolonged/high intensity swimming in a warm water environment.