Hi I have had niggles with my knees with past exercise classes with similar moves I was advised
to put ice on it for 20 mins wait 1 hour and repeat also look into new trainers you may not be getting
the same support from your old ones x

My first round of Insanity, my knee really started to bug me during month two, even though I had been taking Glucosamine the whole time. My coworker told me about chia seeds. I finally got around to getting some. Wow! I didn't even have a full serving and when I woke up the next day the was Zero pain! I made sure to take them every day. I'm out now, but month two starts in cpl weeks and I will have to make sure to get some! I usually just mixed mine into my shakes, but sometimes I sprinkled them on my salad. You can pretty much eat them however; except you can't cook with them. Something about the heat doing something to the makeup of the seeds.

I encountered the same problem somewhere around week 3 of the first month. Here are a few things that helped me, just to give you more options to try. The first thing I did was take a few days off and to let my knee rest, and did daily ice treatments. When I got back to the daily workouts, I wore just a simple neoprene knee sleeve, which provided a little bit of extra support. Prior to beginning the workout I would do my own light 5-minute warm-up, just to get the blood pumping and the knees moving a little before starting Shaun T's crazy warm-up. And finally, I found that doing the program without shoes really helped. Probably because without shoes on, I had to focus more on landing lightly and cushioning each jump instead of just pounding on the floor every time. I'm not sure which one of these things helped the most, or if it was due to the combination, but I was able to complete the program twice without having any further issues.

BTW - the move that caused my initial knee problem was the 180-degree twisting squat jumps. When you start getting tired on that one it's super easy to land before you're fully rotated around and twist your knee. So beware of that move! I modified it so that I was doing more of a jump with a small hop before going down into the squat. I think as long as you're still moving and pushing hard during each move, it's okay to come up with your own modifier to protect yourself if you're having joint issues.

Definitely make sure your shoes are good for all the vertical moves. When I started Insanity I actually had pretty bad knees and wore a brace on one for added support until it got strong enough to eave the brace off. I haven't needed a brace for about a year now and have absolutely no issue with my knees anymore.