The effects of local versus systemic passive heating on the acute inflammatory, vascular and glycaemic response
journal contributionposted on 11.01.2021, 09:39 by Sven HoekstraSven Hoekstra, Takahiro Ogawa, Miguel Dos Santos, Greg Handsley, Stephen BaileyStephen Bailey, Vicky Goosey-TolfreyVicky Goosey-Tolfrey, Fumihiro Tajima, Jem Cheng, Christof LeichtChristof Leicht
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, ten 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 3h post-session to assess inflammatory markers, while a 2h oral glucose tolerance test was initiated 1h post-session. Femoral artery shear rate 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*270min) and WBH (833±476 pg/mL*270min) compared with CON (565±325 pg/mL*270min; p<0.047). Glucose concentrations were higher after WBH compared with LBH and CON (p<0.046). Femoral artery shear rate was higher at the end of WBH (1713±409 L/min) compared with LBH (943±349 L/min; p<0.001), and higher in LBH than CON (661±222 L/min; p=0.002). Affect and thermal comfort were more negative during WBH compared with LBH and CON (p<0.010). In conclusion, local passive heating elevated shear rate 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.
- Sport, Exercise and Health Sciences