Cross Unders on Bosu

Intermediate Level of Difficulty

The cross under on the Bosu is an intermediate core conditioning 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.

Picture of Obliques


Many people put a lot of focus on working their abs but forget their surrounding neighbors; the oblique muscles. Obliques serve as stabilizers, and are used in almost every physical activity. Exercising your obliques should be a very important part of your workout program.

Equipment Used

Picture of Bosu


The BOSU balance trainer stands for "Both Sides Utilized" and is most often used for balance training, various athletic drills and aerobic activities.

Exercise Instructions

cross unders on bosu - step 1

Step 1

Start in a push-up position on the Bosu with your shoulders over your hands and your back flat.

cross unders on bosu - step 2

Step 2

Cross your knee under your body and touch your elbow.

cross unders on bosu - step 3

Step 3

Put your leg back to the starting position.