Plank
Planks are the most effective abdominal exercise. It is extremely simple. All you have to do is get into a push-up position with your elbows bent at a 90% angle. Maintain a straight line from your toes to your head.
Planks are the most effective abdominal exercise. It is extremely simple. All you have to do is get into a push-up position with your elbows bent at a 90% angle. Maintain a straight line from your toes to your head.