I'm in the same situation. Work in a five star spa with no limit on massage! We forever have girls phoning in sick or off with RSI, swollen tendons etc it's a nightmare. I've been there 7 years and no way could I cope with working there full time anymore, my wrists are too sore, I went to 3 days a week to now just one day (I'm mobile also) all I can say is keep the correct posture, make sure you are bending your knees as eventually it will take its toll on your back also. And use elbows and forearms as much as you can. Do small arm and wrist stretches at the start of each day and when it's too much I find combination of rest, ice and heat on my wrists does the trick. Unfortunately there's not much else you can do, which is a shame if you love doing massage like me! Hope this helps xx