@Dr-GO We must be careful with ANY machines or athletic programs for muscle development. Playing the trumpet IS physical, but is fine motor activity. Building a 6 pack is mostly contraproductive as we learn to use ever more force in conjunction with our body. We need thousands of „lowest“ impact reps to develop the patterns for playing to keep tension down and still get enough development. The prepared body is something earned in this special way. I avoid all advanced development with the Circle of Breath. It is potentially detrimental as most of us do not understand the connections between body and mind that are also developed in very small steps.
This low impact „requirement“ is actually something for life in general. Really good yoga, Feldenkrais, Alexander Technique teachers only work this way. Our bad body habits are also built a little more slouch every day. Fixing them is not by force, rather gently.
That all being said, there are many fine players that work out intensively. We have to know that they did not build their playing habits this way. Once we are at a high level of playing, our bodies are very resilient. This fact has resulted in many „brute force“ embouchure and playing methods over time. They have not withstood the test of time!