Department of Rehabilitation Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan.
Sports Medical Center, Hiroshima University Hospital, Japan.
Prosthet Orthot Int. 2021 Oct 1;45(5):401-409. doi: 10.1097/PXR.0000000000000030.
Persons with an amputation may have an increased heat strain due to reduced surface area. However, there is limited evidence on the thermoregulatory responses in persons with lower-limb amputation (LLA). Although a previous study reported no difference in their rectal temperatures (Tres) in a hot environment, suggesting compensatory sweating of the intact limb, we examined the thermoregulatory responses of such persons in a hot and humid environment.
To compare the thermoregulatory responses-through changes in Tre, sweat, and oxygen uptake (O2)-between persons with LLA and able-bodied (AB) individuals, in hot and humid environments.
A nonrandomized control trial.
Nine AB men (AB group) and nine persons with LLA group performed the arm ergometer exercise at 60% peak power output intensity for 60 min in a hot and humid environment, and they were tested before and after performing. The O2, Tre and skin temperature, and total body sweating, and local sweating during exercise were measured and compared between the groups.
The changes in O2 and Tre after the endurance exercise did not differ between the groups (ΔTre: AB group, 1.1°C ± 0.5°C; LLA group, 1.2°C ±0.3 °C; P = 0.65), whereas the amount of local sweating of the chest (group effect, P < 0.01 by two-way analysis of variance [group × time], the group effect size was medium, η2 = 0.10) and dehydration rate (AB group, 1.5% ± 0.5%; LLA group, 2.1% ± 0.5%; P = 0.03) were higher in the LLA than in the AB group.
We compared the thermoregulatory responses of persons with LLA with those of AB individuals in hot and humid environments. Core body temperatures of persons with LLAs during endurance exercise were not different from those of AB men even in hot and humid environments. We found compensatory increases in the sweat rate of the chest and increased dehydration rate in persons with LLA. More sweat potentially means that athletes with LLA need to drink more fulids.
由于表面积减少，截肢者可能会出现更大的热应激。然而，关于下肢截肢（LLA）患者的体温调节反应的证据有限。尽管之前的一项研究报告称，在炎热环境中，他们的直肠温度（Tres）没有差异，表明完整肢体代偿性出汗，但我们在炎热和潮湿的环境中检查了此类患者的体温调节反应。
比较LLA 患者和健康人（AB）在炎热和潮湿环境中通过 Tres、出汗和摄氧量（O2）变化的体温调节反应。
非随机对照试验。
9 名 AB 男性（AB 组）和 9 名 LLA 患者在炎热和潮湿环境中以 60%峰值功率输出强度进行 60 分钟的手臂测功器运动，在运动前后进行测试。测量和比较两组运动过程中的 O2、Tres 和皮肤温度、全身出汗和局部出汗。
耐力运动后 O2 和 Tre 的变化在两组之间没有差异（ΔTre：AB 组，1.1°C±0.5°C；LLA 组，1.2°C±0.3°C；P=0.65），而胸部局部出汗量（组间效应，P<0.01 由双向方差分析[组×时间]，组间效应大小为中等，η2=0.10）和脱水率（AB 组，1.5%±0.5%；LLA 组，2.1%±0.5%；P=0.03）在 LLA 组中更高。
我们比较了 LLA 患者和 AB 个体在炎热和潮湿环境中的体温调节反应。即使在炎热和潮湿的环境中，LLA 患者在耐力运动期间的核心体温与 AB 男性没有差异。我们发现 LLA 患者的胸部出汗率代偿性增加，脱水率增加。更多的汗水可能意味着 LLA 运动员需要喝更多的液体。
