人们在工作或者学习一段时间之后就会产生疲劳,如果疲劳不能及时消除,不仅影响工作或学习效率,而且也有碍身体健康。所以,参加工(课)间操活动,做到有张有弛显得尤为重要。对于脑力劳动者:来说,首先必须重视坚持做工间操。因为长时间地伏案工作,一方面局部肌肉较长时间的静力紧张而引起静力性疲劳,另一方面还会 People fatigue after working or studying for a period of time. If fatigue can not be eliminated in time, it will not only affect the work or study efficiency, but also hinder their health. Therefore, to participate in work (class) inter-gymnastics activities, it is particularly important to have Zhang relaxation. For mental workers: First, we must attach importance to adhere to the internship. Because of the work desk for a long time, on the one hand the local muscle fatigue for a long time caused static fatigue, on the other hand will