When it's time to hit the gym, most of us are in a serious time crunch. If your idea of a gym workout involves walking on the treadmill, riding the stationary bike or just doing laps around the track, you could be wasting your time.
Sweating up a storm with basic cardio feels good in the moment, but you won't be doing your muscles any favors with that routine.
ab crunchesWorkout Tip of the Week: Ramp Up Your Resistance RoutineHealth & Fitness: Zappos blogs Fri, 06/19/2009 - 07:00
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