Maximal treadmill exercise test was performed, and maximal oxygen consumption(O 2max), respiratory quotient(RQ), heart rate(HR) and treadmill run time(TRT) were measured.

• 采用平板递增负荷的方式 ,检测其最大耗氧量 (V? O2 max)、呼吸商 (RQ)和心率 (HR) ,记录平板运动时间 (TRT)。