The Side Lunge will work to target smaller, frequently missed muscle groups to gain joint balance and stability in your lower body. From standing, extend on leg in a full step to the side, keeping your other foot planted and bending the knee directly above. Send your hips back and keep your core upright, toes facing forward. Push down through the right foot as you step back to standing, feet together. Repeat these steps with your opposite leg to balance it out.