课间健身健脑十六法●陈菀琪陈东人体承受能力是有一定限度的，超过这个限度就会产生疲劳，影响身体健康。通常，青少年注意力集中的时间大约是３０至４０分钟，如果学习时间过长，会感到头晕眼花，四肢无力，筋骨不展，腰酸背痛。科学地安排好课间休息，对消除疲劳、清脑... Health and fitness during the sixteen law ● Chen Qiqi Chen Dong human capacity is a certain limit, beyond this limit will produce fatigue, affecting their health. Usually, young people concentrate on the time is about 30 to 40 minutes, if the study time is too long, will feel dizzy, limb weakness, lack of strength, back pain. Scientifically arranged break between classes, to eliminate fatigue, Qingnao ...