2. Plank elbow push-up
Not only will you be working your entire core with this exercise but you'll be toning your upper body also.
The upper body contributes to your overall shape.
Therefore, if you want to have that sexy hourglass shape then your workouts must also target shoulders, back, arms, triceps and biceps.
How to do it
Get into the plank position using both elbows to support your upper body and legs straightened.
Now you're going to slowly push up your body, straightening your arms and pause for 1 second.
After the pause slowly lower back to the starting position and repeat.
When performing this exercise make sure that your entire core is tightened.