This can cause lower jaw pains as well as muscle pains in the back of the head.

这会引发下颌痛和后脑勺肌肉痛。

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Signs of low back tenderness (58.8%), abnormal pinprick sensation (58.0%), lumbar dysfunction (43.3%), and muscle weakness of the lower limbs (42.3%) were commonly observed.

临床体征以腰背部压痛(58.8%)、下肢皮肤针刺觉异常(58.0%)、腰椎活动受限(43.3%)和下肢肌力减弱(42.3%)多见。

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The cause of lower back pain may be one of these factors such as muscle strain, poor posture, lack of exercise or movement, and depression.

事业的下背痛可能是其中的一个因素，如肌肉拉伤，可怜的姿势，缺乏运动或运动，和抑郁症。

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Muscle activation: This phase involves four-second contractions of major muscle groups in the lower body, including calves, quadriceps, hamstrings, hip flexors, groin, and hip and lower back muscles to help athletes increase awareness of individual muscle groups.

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