the effective of Dumbbell, lying push.

The dumbbell is a hand chrome dumbbell push up, the two elbows inside, the elbow at the same time the chest. The dumbbell set is slightly forward while rising, showing a parabolic trajectory. When the arms are straight, the center of gravity of the dumbbell is close to the support point of the shoulder joint.
However, do not happen to be at the support point of the shoulder joint, which will make the bones support the weight of the dumbbell(this case where the weight is supported by the bones rather than the muscles is called “locking”), making the pectoral muscles relax and affect the exercise effect. Then, the two straight arms are opened to the sides, the arms are slowly bent, and the dumbbells fall vertically. When they fall to the lowest point, they push up.

bai1 g69 g68  50kg dumbbell

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