Yaw arm: when running, the action of swinging arm is exaggerated, such as too large amplitude, too fast frequency or simply swinging arm laterally, which not only increases unnecessary consumption, but also may cause the body to shake left and right and increase the load of lumbar spine
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When running, the arms should swing naturally
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High shoulders: when running, the shoulder muscles are tight, stiff and high, which will make the shoulders tired and sore
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Conversely, shoulder fatigue will also aggravate the tension of the upper body and enter a vicious circle
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Solution: fully warm up before running and let the shoulder muscles move; When running, the shoulders sag naturally and the palms relax, otherwise the muscle tension may spread to the shoulders and back; If you feel that your shoulder is tight, it is recommended to stretch and shake your neck and shoulder first to relax your muscles
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Solution: coordinated movement of arms and body is the most efficient way
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The arms should take the shoulder as the axis, swing back and forth between the chest and waist, and keep the elbows bent at 90 degrees
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