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Build a Strong Core With This 3-Move Ab Workout Break free of your stale situp regimen with a smarter series. By Brett Williams, NASM Published: Jan 29, 2020 11:18 AM EST ...

Fitness I did a 30-minute core workout with zero equipment — here's how my abs responded Fitness Forget sit-ups — it only takes 15 minutes and 1 dumbbell to build a strong core ...