I got an email from a college student taking an Occupational Health and Wellness course. He asked me some questions about health and wellness issues in woodwind doubling, and I tried to answer the best I could.
How do you prepare for the many instrument switches in a musical which require changes of embouchure and hand position/key action adjustments? How do you deal with the physical demands of switches between many instruments?
The best preparation is to develop good, relaxed technique on each instrument independently. I try to practice each instrument carefully and produce the best possible sound on each one.
If I have the luxury of reviewing the part ahead of time, I will often practice the “choreography” for quick instrument switches, and make plenty of pencil marks so that I know ahead of time what switches are coming up. I try to keep a consistent layout of my instrument stands for each show, so that I get used to where each instrument is.
As I am making each switch (even very quick ones) I will try to take a moment to totally relax my facial muscles, hands, etc., and, maybe most importantly, flip a mental switch to oboe mode or clarinet mode or whatever.
Good reliable stands and neckstraps are vital.
Would you say that having to adjust to the action and key pressure of multiple instruments makes you more susceptible to hand/forearm injury than a musician who plays a single instrument?
I’m not an expert, but I would think that playing a single instrument is more dangerous in terms of repetitive motion injuries, etc. If I spend five hours a day practicing (I wish!) then I think I’m better off with more varied physical activities.

Does playing any one instrument create body tension that affects another instrument? (ex. flute might create shoulder tension which affects playing the sax)