Forget sit-ups — 10 best crunch variations to sculpt your core muscles without weights

At Tom’s Guide, our fitness team loves a challenge, and crunches are no exception. We’ve already clocked up double digits when testing the best crunches and crunch variations for our tried and tested round-up of favorites.

If you’re debating sit-ups vs crunches when adding the best ab exercises into your ab routine, park the sit-ups for a moment because the benefits of crunches are many. According to Harvard research, developing a stronger core improves posture, protects you from injury and increases flexibility and range of motion, helping you perform exercises and daily movement better.