单项选择题
A.改良跨栏拉伸（Modified hurdler stretch）B.向前推墙拉伸（Forward wall push stretch）C.跨式拉伸（Straddle stretch）D.腿交叉直立触摸脚尖（Cross-legged standing toe touch）
A.KarvonenB.DiaphragmaticC.valsalvaD.Anginal
A.8.2METB.10.2METC.13.2METD.15.2MET