John is right, in general, of course. But keeping in mind what Seamus Egan says -- that playing the flute takes no more breath than talking, and the example set by Peter Horan -- you wonder to what extent aerobic training would affect flute playing.
Engaging the muscle without changing its length is isometric. This is similar to Yoga practice and to certain types of resistance training. Its value in holding one's posture for hours at a time is pretty obvious.
Engaging the muscle while changing its length is isotonic. This practice would involve lengthening and shortening the muscle and engaging the muscle in concentric and eccentric contractions. Done properly the muscle, although becoming denser, also becomes more flexible and stretched, as in some forms of Yoga.
Much of resistance training, and core development, can be done as an aerobic exercise. Squats, lunges, push-ups and crunches done as Tabata workouts are perfect examples. Tabata workouts work as anaerobic and aerobic exercises at the same time.
My own feeling is that everything counts. It's just that some things are more efficient than others. My exercise program involves teaching three classes of resistance training/core development/Yoga a week for about 40-45 minutes per session. I do private sessions as well but my own workouts fit into the three 45" sessions. There is plenty of stuff on the net about all this. And I'll be happy to answer any questions by email.
Tabata is the name of a Japanese researcher who discovered an interesting way to increase both anaerobic and aerobic pathways at the same time. It's one of those strange training programs that seems to fit across disciplines: it's excellent for bicyclists, speed skaters, Olympic lifters, or the person looking to lose fat quickly.
Take one exercise and perform it in the following manner:
1) For twenty seconds, do as many repetitions as possible.
2) Rest for ten seconds
3) Repeat seven more times!
You really shouldn't consider doing much after the Tabata workout. Your lungs will be going like a locomotive engine.
http://www.t-nation.com/readArticle.do?id=490160