OldPete,
Moshe brings out an important point regarding advising a trumpet component to rehab. Data and research are helpful and even more the most important information comes from the question: How are you doing?
What rehabilitation has been arranged for you?
Is the sternum pain (surgical site of chest wound) a significant problem?
If this is a problem, what makes it better; what makes it worse?
Please understand that this is an open forum with many readers reviewing our discussion. Patient privacy is ABSOLUTELY paramount. Only post what you think you may want others to experience to keep this on a user friendly learning curve. Any further advice will only come further should you want to update your experience. If you would also to communicate through personal message, I would be glad to advise.