Note: running posture and belly size

　　some elderly During long-distance running, the shoulders sink, the arms are bent too small and droop too much, too loose, the legs cannot be lifted, the stride is small, no airborne, inelastic, the breathing rhythm is uneven, and the stomach bounces up and down with every step. Over time, it affects the control of the abdominal muscles, causing the belly to sag and protrude.

　　Correct running movements should be: lift your shoulders slightly, bend your arms at 90 degrees, swing slightly back and forth but bounce slightly up and down, raise your shoulders slightly, raise your thighs higher in front during running, push back fully, and have a large and elastic stride. This can make the abdominal muscles tense, lift the inner belly, and breathe evenly, slenderly, fully, and rhythmically. During running, the abdominal muscles are appropriately tense, and pay attention to raising the air. This in itself is a training for the function of the respiratory organs, and it is also a training for the abdominal muscles. exercise , which enhances the control of abdominal muscles and is also an effective method for body fitness.