"People are so focused on cardio that when they can't afford a gym membership, workouts go by the wayside," says Kathy Kaehler, who has trained with Julia Roberts for over a decade. "Strength is important too! Five-pound weights allow you to do circuit and strength workouts, which keep your heart rate up, increase your metabolism and help you tone."
5-pound dumbells, $13; at amazon.com.
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Follow Kathy on Twitter @kathykaehler
Lisa TilsonRead MoreLess