wilcox96

Some of this may be "what" you are practicing as much as when/how much. Do you also play gigs? Perhaps better put.... do you have opportunities to play "music" ..as in something other than practice type material? IF so...what type? Are you also trying to fit that practice schedule in on gig days?

You really sound like you are already in tune with how your body is reacting. You also seem like you are listening...but perhaps not responding as well as you could.

Using Myot's example (but coming at it from another angle), I "also" would not measure your work in terms of trying to achieve a certain number of hours per day. Sure..this is great and perhaps a good way to have practice discipline. However, if you end up getting a great workout in less time...and especially if you are gigging/performing also...then that may be okay. This is versus what you are experiencing now..where you are fatigued. On an actual performance...you might not be.

All that said...geesh, if you are going through an embouchure change, it is doubly hard for you to figure out. It might be an even better thought to scale back on the number of hours until you can "slowly" increase practice. Most of our issues with practice is that balance between pushing ourselves and having patience with where we are at that moment. Most of the time...it is gradual improvement, if we "don't" overstep our abilities too soon.

It's kind of like working out with weights. Sure, you may be able to lift a zillion pounds at one fell swoop. But is your form good? Are your muscles being torn/worn down? Probably!! Could you lift that zillion pounds a bunch of times over the course of a few hours (especially without rest)? Probably not. Isn't the purpose to build "up" strength and stamina?? If you lower the weight to a more manageable size...and use full, comfortable motion...your muscles get a greater workout, with less fatigue and strength is built. After a few patient weeks...gradually increase the weight...maintaining that same good form. You get stronger without tearing yourself down. Long term, baby...

Same with trumpet.

Take your time. Great that you are taking lessons. You seem like a smart guy. Good questions... just lack a bit of patience. Hang in there. It will come around in time. I wish you great success...