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A 10-minute massage improves your rebound time after a training session.
Just halfway through the challenge, Charlie's already seeing dramatic results.
Watch these horrible (and hilarious) kettlebell training videos before you become a cautionary tale.
We asked for your help motivating Charlie, and you delivered.
We drop in on Charlie to make sure he maintains intensity without a trainer.
A professional lumberjack explains how to chop wood and carve out a six-pack.
Charlie gets pushed to the brink.