Medicine Ball Single Knee In

Intermediate Level of Difficulty

The single leg knee in on the medicine ball is an intermediate core exercise that targets the abs and obliques.


Picture of Abdominals


The abdominal muscles (abs) provide movement and support to your core area. The deeper and closer to the spine the particular abdominal muscle is, the more effect over body posture it will have, and this often contributes significantly to a healthy back.

Equipment Used

Picture of Medicine Ball

Medicine Ball

A medicine ball (also known as an exercise ball, med ball, or fitness ball) is a weighted ball roughly the diameter of the shoulders (approx. 14 inches). Medicine balls come in a variety of weights from 2lbs. to 30lbs. and can be made of hard plastic, dense rubber or synthetic leather material.

Exercise Instructions

medicine ball single knee in - step 1

Step 1

Start in a plank position with both hands on the medicine ball, your hands under your shoulders your lower back flat and one leg raised in the air.

medicine ball single knee in - step 2

Step 2

Pull your leg up into your chest and fully contract your abs.

medicine ball single knee in - step 3

Step 3

Place push your leg back out to the starting position and repeat.