
Every routine needs a good shake-up, say our pros. Do 12 to 15 reps with light weights one day, 8 to 10 reps with moderate weights another, and 6 to 8 reps with heavier ones another -- scientists agree this firms better than doing the same ol' sets. Try this new ab toner from Paul Frediani: Stand holding a 5-pound dumbbell with both hands in front of you. Keeping body still, move weight from right to left 20 times; repeat.
Get Stronger, Faster
Boost strength an extra 20 percent by limbering up between sets. Target the same muscle in your stretch and your workout. For example, do 10 squats followed by a 20-second-long quad stretch.
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