Hi! I am in Level 5 now, which is quite awesome to me. I would like to build some more muscles, so I was thinking about putting 10kg (22lbs) into a backpack and carry this while doing all the exercises, at Level 1. Right now I weigh 70kg (154lbs), and did L5D3 in 8 1/2 minutes.
What do you think, is this a good idea to build more muscles, or stupid, or dangerous?
