I don't have any formal training due to transportation issues, but I practice boxing on my own. This is a bad idea and a teacher is essential for pointing out flaws and stopping bad habits early, but I do it anyways. Offer your opinion on how much this affects me. Be brutal and honest. For some background, I'm 20, 223 lbs.

http://www.youtube.com/watch?v=Gh-HTqNkWuE