The impact of a single bout of high intensity circuit training on myokines' concentrations and cognitive functions in women of different age

The study aimed to assess effect of a single bout of high-intensity circuit training (HICT) on myokines concentration: interleukin-6 and irisin, inteleukin-10, brain-derived neurotrophic factor (BDNF), heat shock proteins (HSP27, HSP70) and cognitive functions among women participated in HICT. It also attempted evaluating whether vitamin D could have modified the effect of HICT. Fourteen healthy, non-active women participating in the experiment were assigned to a young or middle-aged group. They performed a single session HICT using body weight as a resistance, based on the AGSM recommendations. Blood samples were taken before, one and 24 h after training. Cognitive functions were assessed before and 1 h after the HICT session. Simple statistics and effects of changes for dependent variables were determined using mixed linear modeling, and evaluated by means of magnitude-based inference (MBI). Following a single session of HICT the young group exhibited improved concentration and spatial memory, whereas in middle-aged women these functions were attenuated. A varied tendency was also observed in the levels of myokine IL-6 and cytokine IL-10. Vitamin D was covariate for changes in cognitive functions and myokines' levels after exercise. Its concentration modified the anti-inflammatory effect of HICT, expressed in decreasing HSP70.