What does fitness level have to do with music study?
Check out this abstract: "...The research suggests that physical fitness training leads to improved mood, self-concept, and work behavior; the evidence is less clear as to its effects on cognitive functioning, although it does appear to bolster cognitive performance during and after physical stress. Except for self-concept, personality traits are not affected by improvements in physical fitness..."
Sounds good to me. See you at the gym.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted percussionist and drum teacher.