School of Sport Science, Exercise and Health, The University of Western Australia, Crawley, Western Australia.
J Athl Train. 2010 Mar-Apr;45(2):164-9. doi: 10.4085/1062-6050-45.2.164.
Cooling jackets are a common method for removing stored heat accumulated during exercise. To date, the efficiency and practicality of different types of cooling jackets have received minimal investigation.
To examine whether a cooling jacket containing a phase-change material (PC17) results in more rapid postexercise cooling than a gel cooling jacket and a no-jacket (control) condition.
Randomized, counterbalanced design with 3 experimental conditions.
Participants exercised at 75% V o(2)max workload in a hot climate chamber (temperature = 35.0 +/- 1.4 degrees C, relative humidity = 52 +/- 4%) for 30 minutes, followed by postexercise cooling for 30 minutes in cool laboratory conditions (ambient temperature = 24.9 +/- 1.8 degrees C, relative humidity = 39% +/- 10%).
Twelve physically active men (age = 21.3 +/- 1.1 years, height = 182.7 +/- 7.1 cm, body mass = 76.2 +/- 9.5 kg, sum of 6 skinfolds = 50.5 +/- 6.9 mm, body surface area = 1.98 +/- 0.14 m(2), V o(2)max = 49.0 +/- 7.0 mLxkg(-1)xmin(-1)) participated.
INTERVENTION(S): Three experimental conditions, consisting of a PC17 jacket, a gel jacket, and no jacket.
MAIN OUTCOME MEASURE(S): Core temperature (T(C)), mean skin temperature (T(Sk)), and T(C) cooling rate ( degrees C/min).
Mean peak T(C) postexercise was 38.49 +/- 0.42 degrees C, 38.57 +/- 0.41 degrees C, and 38.55 +/- 0.40 degrees C for the PC17 jacket, gel jacket, and control conditions, respectively. No differences were observed in peak T(C) cooling rates among the PC17 jacket (0.038 +/- 0.007 degrees C/min), gel jacket (0.040 +/- 0.009 degrees C/min), and control (0.034 +/- 0.010 degrees C/min, P > .05) conditions. Between trials, no differences were calculated for mean T(Sk) cooling.
Similar cooling rates for all 3 conditions indicate that there is no benefit associated with wearing the PC17 or gel jacket.
冷却夹克是一种常见的方法，用于去除运动过程中积累的储存热量。迄今为止，不同类型的冷却夹克的效率和实用性受到了最小的研究。
研究一种含有相变材料（PC17）的冷却夹克是否比凝胶冷却夹克和无夹克（对照）条件能更快地进行运动后冷却。
随机、平衡设计，有 3 个实验条件。
参与者在热气候室（温度=35.0 +/- 1.4 摄氏度，相对湿度=52 +/- 4%）以 75%最大摄氧量（V o(2)max）的工作量进行 30 分钟的运动，然后在凉爽的实验室条件下进行 30 分钟的运动后冷却（环境温度=24.9 +/- 1.8 摄氏度，相对湿度=39% +/- 10%）。
12 名活跃的男性（年龄=21.3 +/- 1.1 岁，身高=182.7 +/- 7.1 厘米，体重=76.2 +/- 9.5 公斤，6 个皮肤褶皱总和=50.5 +/- 6.9 毫米，体表面积=1.98 +/- 0.14 平方米，V o(2)max=49.0 +/- 7.0 毫升 x 公斤(-1) x 分钟(-1)）参加了研究。
三个实验条件，包括 PC17 夹克、凝胶夹克和无夹克。
核心温度（T(C)）、平均皮肤温度（T(Sk)）和 T(C)冷却率（摄氏度/分钟）。
运动后平均峰值 T(C)分别为 PC17 夹克、凝胶夹克和对照条件下的 38.49 +/- 0.42 摄氏度、38.57 +/- 0.41 摄氏度和 38.55 +/- 0.40 摄氏度。在 PC17 夹克（0.038 +/- 0.007 摄氏度/分钟）、凝胶夹克（0.040 +/- 0.009 摄氏度/分钟）和对照（0.034 +/- 0.010 摄氏度/分钟，P >.05）条件下，没有观察到峰值 T(C)冷却率的差异。在试验之间，平均 T(Sk)冷却没有差异。
所有 3 种条件的冷却率相似，表明穿着 PC17 或凝胶夹克没有益处。
