@alejandromatias674: If you do 20 body waves 20 arm swings 20 rag doll twists 20 golf swings 20 arm rotations 20 reverse flies 20 overhead reaches you will have a simple upper body warm up that actually works. This sequence warms up the rotator cuff, restores shoulder rotation, improves overhead flexion, and gets your spine moving through flexion, extension, and rotation. From a science standpoint, low load, high quality movement increases blood flow, synovial fluid circulation, and neural readiness around the shoulder joint. That means better movement today and fewer issues long term. No equipment. No fancy routine. Just consistent daily movement. Simple done daily will always beat complicated done occasionally.