Serious eye strain can lead to persistent headaches, muscle pain in the head, neck and upper back, as well as long term problems like myopia.

严重的眼疲劳会导致长期的头痛，头部，颈部和上发背的肌肉疼痛，也可能会引起一个长期的问题近视。

youdao

Function: Enhance the muscle strength of upper limbs, chest and the back., improve the cardiopulmonary function.

功能：增强上肢及背部肌肉力量，提高人的心肺功能。

youdao

Function: Enhance the muscle strength of upper limbs, chest and the back., improve the cardiopulmonary function.

功能：增强上肢及背部肌肉力量，提高人的心肺功能。

youdao