Insanity--Shoes?

Be careful doing this type of exercise barefoot. It is very hard on the joints. After a while not having the proper footwear to absorb the shock/ impact will take a toll on your feet and knees.

There are studies that have proven that we land *harder* in shoes, with more impact, because we expect the cushioning of the shoe to cushion our landing, which it doesn't. It's been said you can put an egg in an oven mitt, but if you hit it with a hammer, you'll still get a broken egg!
Without shoes, you learn to use your body's own shock absorbing system, and land softer to protect your feet & joints. If you stomp & land hard though, I agree...look out!

I am on the penultimate week of insanity and so far I have been doing the exercises either barefoot or just in my socks. I am happy to wear shoes but when you live on a top floor apartment it can be a pain for those living underneath especially when I am doing my exercises at 6am.