Step 1: Lie face down on a mat so your toes, forearms, and fists are holding all of your weight off the ground. Your body should create a straight, plank-like figure. Create a neutral (flat) spine ...

How to make a plank harder Once you know how to do a plank, you can make the exercise harder by adding weight - with one of the best weighted vests or ankle weights - and doing simple variations.

Number 2: Plank With Side Step Start on the floor, resting on your forearms and knees, and come up into a plank position. Contract your abs to prevent your booty from sticking up or sinking.

Want to sweat like J.Lo? Celeb trainer David Kirsch uses this two-step glider plank variation with his clients. Here's how to complete the move.

Exercises that focus on the core of the body muscles are a great way to stay fit, be strong, and feel good.