1, bicycle inner tube. Can be used as a stretcher.

2. Use a wooden stick, the long and short hands can be held separately, and the thick and thin hands are more suitable. Tie the middle of the stick with a rope. Tie a quick brick below, which is the brick for building a house. Roll up the stick with both hands, roll up the rope and put it back slowly. You can practice your forearm.

3, brick exercise, is to pinch a brick with one hand and flip it up and down in the body.