Using the proper technique for doing planks for abs is one of the greatest and most underrated exercises ever.
It’s practically a one-move static exercise that will help you build a core of steel, ripped abs and strong shoulders. Just get into push-up position on the floor, bend your elbows 90 degrees and prop yourself on the elbows, forearms and forefeet, forming a straight line from head to feet, then hold it for as long as you can without moving your waist or butt.
is the ultimate bodyweight exercise that utilizes literally every major muscle in your body, thereby helping you firm your whole body.
Get into a plank position, placing your hands directly under the shoulders and push your whole body up, maintaining a straight line with the legs, back and butt. Lower your body down on the same way and repeat.