Rotator cuff muscles include supraspinatus, infraspinatus, teres minor and subscapular muscles. The function is to stabilize the shoulder joint.
Practice method:
Use the gantry to adjust the handle to waist-high position, grasp the handle, keep the big arm close to the body, and keep the small arm horizontal to resist the resistance and make the big arm rotate inside and outside.
If I don't understand what I'm talking about, you can watch the rotator cuff muscle training video.
Many people don't know how to keep fit, they don't pay attention to the exercise of deep muscles, and few people know about rotator cuff muscles. If you practice deep muscles, your body will be more stable and your overall strength will be greater. You can do more weight-bearing exercises.