Aerobic fitness
Most adolescents in both the FAO and non-FAO groups had low aerobic fitness, with proportions of 85% and 76%, respectively (p>0.05). No significant differences were observed between groups in the VO2peak, minute ventilation, and oxygen pulse recorded during the CPET (p>0.05, Table 2). During maximal exercise, ventilation was not considered a limiting factor; however, cardiac function was near the maximal limit (Table 2). Peripheral muscle fatigue was more severe than was dyspnea perception, and all adolescents requested to stop the CPET due to lower limb fatigue (p<0.05; Table 2).
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