The plank with oblique crunch is a multi-functional exercise that improves core strength with an emphasis on the obliques. The exercise also develops stability throughout the lower back and spine.
Start in a plank position, making sure your body is in a straight line and your hands are directly beneath your shoulders.
Bend one leg and bring the knee toward your shoulder on the same side, crunching your obliques as you do so. Keep the upper body stationary throughout the movement. Pause and return the leg to your starting position.
Do not allow your back to round.
Squeeze your abs and glutes to maintain stability throughout the entire exercise.
Do not allow your hips to drop or sag during the movement.