10-Minute Ab Workouts on YouTube
If All You've Got Is 10 Minutes, These Ab Workout Videos Are a Must-Do
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NASM-certified trainer Sydney Cummings suggests using a light dumbbell (she's using five pounds), but if you're unsure of what weight to grab, here's a guide for how to choose the right one. You'll do two rounds of five different exercises, starting with toe touches and ending with a "hollow reach and tuck."