Cardiorespiratory fitness modulates the proportions of monocytes and T helper subsets in lean and obese men.

This study investigated the peripheral frequency of monocytes, CD4 + T cell subsets and the systemic levels of cytokines in lean and obese men with different levels of cardiorespiratory fitness (CRF). Mononuclear cells were obtained from 45 lean and 45 obese men who were assigned into six groups according to their body mass index and CRF (low, moderate, or high VO ) to analyze the frequency of monocyte subsets and subpopulations of CD4 + T cells (Treg cells, CD4 + CD25 CD127 ; mTeff, CD4 + CD25-CD39+; mTreg, CD4 + CD25+CD39+). The systemic levels of interleukin (IL)-6, IL-10, IL-17a, IL-33, leptin, and tumor necrosis factor-alpha (TNF-α) were also evaluated.