If you just want to shape, then use a small weight and do it many times, and the effect is very good. Every movement is done in a light weight. If you cooperate with some aerobic exercise, the effect will be more obvious, but you can do it without it.

The weight depends on your specific situation, that is, if you hold it in your hand, you can guarantee a group of 10- 15 times, and you can achieve 5-8 groups. You don't need that much at first. Add it slowly.

The point is not to be too heavy. This weight depends on your situation.