Stretch your shirtsleeves to the breaking point'"without endless hours of toil in the gym. These four triceps-focused circuit-training workouts will deliver impressive results in 20 minutes.

Do any of the following describe your latest triceps workout? You were 25 minutes in before you started getting to the "heavy" exercises. Or maybe you spent an hour on chest and shoulders, leaving only a few moments to squeeze in four sets of rapid-fire cable pushdowns before you had to hit the showers. Or, worst of all '