The resistance source of elastic band changes mainly based on its elongation. Elastic resistance training of elastic band is a very special resistance training. When using elastic band training, users can train most of the muscles of the whole body at any position and posture, which is more convenient and effective.

The resistance of the elastic band is calculated in kilograms according to its percentage elongation at relative rest. During the elastic band training, we can evaluate the resistance of the training according to the change of the length, and we can also select the appropriate length of the elastic band according to our own situation.