Sure, crunches and sit-ups can be monotonous, and they likely remind you of elementary-school gym class. But they don’t have to be so boring. There are plenty of variations you can incorporate into your strength-training routine that target the muscles that make up your abs. Standard crunches work your rectus abdominis (front part of your abs), while side crunches recruit more from your obliques and reverse crunches target those hard-to-work lower abdominals. Even though doing endless crunches and sit-ups won’t get you those six-pack abs you’ve always wanted, they’re certainly one piece of the puzzle. And by switching up the variations, you can make sure that you’re never bored with your ab routine again. To read more click here!