1, the first action: pull-ups, mainly practicing latissimus dorsi, mainly practicing the lateral and upper sides of latissimus dorsi.

2, the second action: sit down, of course, is also a grip. This action is mainly to practice the upper and outer sides of latissimus dorsi.

3, the third action: standing straight arm pull down, this action is pulled back, mainly to practice the lower side of latissimus dorsi.

4. The fourth action: rowing with dumbbells in one arm. The biggest advantage of this action is that you can practice the latissimus dorsi on both sides separately.