Fig. 3From: High-intensity interval training accelerates oxygen uptake kinetics and improves exercise tolerance for individuals with cystic fibrosisGroup mean ± SD for work-interval duration during week one (gray bars) and week eight (black bars) for the O2+ and AMB groups. * P < 0.05 compared to week one value within group; † P < 0.05 compared to increase for AMBBack to article page