The Peter Harrison Centre for Disability Sport, Loughborough University, Loughborough, United Kingdom.
School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom.
Appl Physiol Nutr Metab. 2021 Jul;46(7):808-818. doi: 10.1139/apnm-2020-0704. Epub 2021 Jan 13.
The aim of this study was to compare the acute cardiometabolic and perceptual responses between local and whole-body passive heating. Using a water-perfused suit, 10 recreationally active males underwent three 90 min conditions: heating of the legs with upper-body cooling (LBH), whole-body heating (WBH) and exposure to a thermoneutral temperature (CON). Blood samples were collected before and up to 3 h post-session to assess inflammatory markers, while a 2 h oral glucose tolerance test was initiated 1 h post-session. Femoral artery blood flow and perceptual responses were recorded at regular intervals. The interleukin (IL)-6 incremental area under the curve (iAUC) was higher for LBH (1096 ± 851 pg/mL × 270 min) and WBH (833 ± 476 pg/mL × 270 min) compared with CON (565 ± 325 pg/mL × 270 min; < 0.047). Glucose concentrations were higher after WBH compared with LBH and CON ( < 0.046). Femoral artery blood flow was higher at the end of WBH (1713 ± 409 mL/min) compared with LBH (943 ± 349 mL/min; < 0.001), and higher in LBH than CON (661 ± 222 mL/min; = 0.002). Affect and thermal comfort were more negative during WBH compared with LBH and CON ( < 0.010). In conclusion, local passive heating elevated blood flow and the IL-6 iAUC. However, while resulting in more positive perceptual responses, the majority of the included cardiometabolic markers were attenuated compared with WBH. The increase in the IL-6 iAUC in response to passive heating is not reduced by upper-body cooling. Upper-body cooling attenuates the plasma nitrite, IL-1ra and femoral artery blood flow response to passive heating. Upper-body cooling leads to more positive perceptual responses to passive heating.
本研究旨在比较局部和全身被动加热的急性心脏代谢和感知反应。使用水灌注服，10 名有规律运动的男性接受了三种 90 分钟的条件：腿部加热而上身冷却（LBH）、全身加热（WBH）和暴露于热中性温度（CON）。在 session 后采集血液样本，以评估炎症标志物，同时在 session 后 1 小时开始进行 2 小时口服葡萄糖耐量测试。定期记录股动脉血流和感知反应。与 CON（565 ± 325 pg/mL × 270 min）相比，LBH（1096 ± 851 pg/mL × 270 min）和 WBH（833 ± 476 pg/mL × 270 min）的白细胞介素（IL）-6 增量 AUC（iAUC）更高（<0.047）。与 LBH 和 CON 相比，WBH 后血糖浓度更高（<0.046）。与 LBH（943 ± 349 mL/min）相比，WBH 结束时股动脉血流更高（1713 ± 409 mL/min；<0.001），并且 LBH 高于 CON（661 ± 222 mL/min；= 0.002）。与 LBH 和 CON 相比，WBH 期间的情感和热舒适度更差（<0.010）。总之，局部被动加热可提高血流和 IL-6 iAUC。然而，尽管引起了更积极的感知反应，但与 WBH 相比，大多数包括的心脏代谢标志物都减弱了。被动加热引起的 IL-6 iAUC 增加不会因上身冷却而减少。上身冷却会减弱被动加热对血浆亚硝酸盐、IL-1ra 和股动脉血流的反应。上身冷却导致对被动加热的更积极的感知反应。
