Fig. 2.

CD4 Naïve and Central Memory T cells are decreased with HIIT compared to MICT, and changes in fitness negatively correlate to changes in CD8 Effector Memory CD45RA+ T cells. Between group comparisons for differentiated T cell subsets before and after exercise training in older women. A-D CD4 Subsets [N=naïve, CM=central memory, EM=effector memory, EMRA=Effector Memory CD45RA⁺], (E-H) CD8 Subsets [N=naïve, CM=central memory, EM=effector memory, EMRA=Effector Memory CD45RA⁺], (I) CD4 Recent thymic emigrants (CD4N+CD31+), (J) CD8 Recent thymic emigrants (CD8N+CD103+). K Changes in fitness are negatively correlated to changes in CD8 EMRA T cells. Data are presented mean with *p<0.05