Neck exercise: cross ten fingers and put two hands back of head, backward the head against the hands and neck, then forward close the elbows, two palms press down;
劲部运动：十指交叉抱头于脑后，头上抬与劲部争力，然后向前合肘，下颌内收，两掌向下按；
Actively push your neck back to strengthen and stretch the front part of your neck while completing this exercise.
做练习的同时，将你的脖子向后伸展以拉伸颈部前部的肌肉。
After the intervention, the exercise group significantly improved their femoral neck bone density score while the control group significantly decreased.
通过介入干预后，运动组的大腿和颈部的骨密度数值明显增加，而对照组的数值明显下降。
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