医学的にマギル博士の言っていることが正しいかというと、現状のスポーツ医学的にはグレー。 こういう反論もある⇒To Crunch or Not to Crunch: An Evidence-Based Examination of... : Strength & Conditioning Journal However, a cause-effect relationship between spinal flexion and injury in these athletes has not been established, and the ballistic nature of such sporting activities has little applicability to controlled dynamic abdominal exercises. Based on cur