Right now I am only an EMT for both a private ambulance company and a very small volly dept. I have had knee problems for the last 10 years. I want to take the 36 hour class so that I can help out more with the volly dept. but I'm not sure about it because of my knee. I don't want to get in a sititution and do more harm then good. I wanted to know if any of you out there have knee problems and how it works for you?