All you treadmill-loving ladies know what we're talking about: Sometimes the habits of your fellow gym-goers are a bit questionable, to say the least. The dude who loudly hums along to his iPod, ...

You hear that sound? I'm applauding your efforts for attempting to work out at home. You have the best intentions to pop in a fitness DVD, hop on your home treadmill, or bang out some bodyweight ...