Get Sculpted Muscles Like J Lo's With These 21 Arms, Abs, and Butt Strengthening Exercises

Work your obliques and challenge your core stability with the Russian twist.

• Sit on the floor with your knees bent. Pull your abs to your spine and lean back a few inches while lifting your feet off the floor. Be sure to keep your back straight.
• Reach your arms out in front of you and twist your torso to the right, then to the left, to complete one rep/rotation.