Hi. I recently purchased the FB Low Impact - Fat Loss Program - 40 Minutes or Less and ran through it once, no problem. The second time, I injured my knee during the kick boxing routine, and I have now had issues with my knee for about 6 weeks. I want to get started again, but overwhelmed with the choices. My level is beginner (with an overweight, over 40 body and wonky knee), but the motivation is there. Any suggestions?