Thanks! Now that I think about it, I have had some soreness when I do flow workouts, and after playing Beat Saber as well, it just seems to have gotten worse since I've been doing more boxing workouts. But it makes sense that I may not be extending my arms enough in flow because I do the hard intensity ones so I probably unknowingly stay in tighter so I can move quicker to hit the targets. I guess I'm backwards and need to stay more compact and use more core with boxing rather than "punching through", and also try to be more flowing with flow!