This is a basic crunch and reverse crunch exercise together. Just lie on your back with your knees at a 90 degree angle and hands behind your head. Lift up your hips off the floor like in a crunch and lift up the shoulder blades off the floor like in a basic crunch. Try to squeeze the core and control the position. Then return back to start position.
The difficulty of the crunch can be increased by lying on a declined bench or holding a weight under the chin, on the chest or behind the head. Crunch exercises may be performed on . Increasing the distance will also increase the load on the abdominals due to leverage.
The curl-up is taught by spine professor Dr. Stuart McGill, and he considers it to be a safer alternative to the crunch, which differs from the . McGill has done extensive research on the effects of crunch exercises on the back, which can be especially harmful for those rehabilitating their backs from an injury.
Since crunches exercise is more controlled, it can help you improve your focus on your exercise routine. And as it does not use any equipment, you can do it anywhere. This exercise can also improve your muscle strength and flexibility.