Abstract
This study verified the impact of five weeks of high-intensity circuit training (HICT) on changes in concentration of exerkines in relation to cognitive functions. Sedentary women (n = 33; age=39±13 years) were randomly assigned into the HICT (n = 21) group or the control group (n = 12). The HICT group performed 15 training sessions; meanwhile, the control group performed the HICT twice, only at baseline and at the end of the experiment. Blood samples were collected before, 1 h and 24 h after the first and last HICT, to evaluate the concentration of exerkines: brain-derived neurotrophic factor (BDNF), irisin, fibroblast growth factor-21 (FGF-21), interleukin-6 (IL-6) and cathepsin B (CATB) using enzyme immunoassay method. Cognitive functions and quality of life were assessed using the Vienna Test System and the Short Form Health Survey. HICT induced improvement of cognitive function and quality of life, and these changes were accompanied by an increase of BDNF and shifts in CATB concentration. HICT program caused a decrease in FGF-21 concentration, which was modified by age and insulin sensitivity. The improvement of cognitive functions was more pronounced in females, who experienced a drop in FGF-21. In summary, HICT program, that can be performed during pandemic, enhanced cognitive functions and this response was related to changes in exerkines.
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