You don’t crunches, sit-ups and planks to increase your core strength and definition, just take this 12-move standing ...

Best sit-up variations for losing weight Here are some easy and effective sit-up variations for weight loss, as suggested by the expert. 1. Bicycle crunch • Lie on your back with your knees bent ...

Place your hands by your temples, with your elbows pointing out to the side. Lift your left knee, and at the same time, bend ...

Sit-ups tighten and tone the abdominal muscles that run from beneath the sternum to above the pelvis. This results in a flatter stomach and, if practised along with plenty of aerobic exercise ...

Start with 5- or 10-pound dumbbells, or a lighter weight if needed. Sit straight up in a chair or on a bench, with your knees at a 90-degree angle to the floor. Hold the dumbbells with your palms up.

The main difference between sit-ups and crunches is the range of motion involved in each exercise. Sit-ups require you to lift all the way up, while crunches require a slight lift off the ground.