For those of you out there who like it to hurt when you work out, at least sometimes, I'd like to recommend CrossFit.Here are a couple of sample workouts:Friday 060721 Complete as many rounds in 20 minutes as you can of:Walking lunge, carrying 25 pound dumbbells, 10 stepsWeighted pull-ups, with 25 pound dumbbell, 10 repsPost number of rounds completed to comments.Monday 060724 Thruster