3-5 Rounds Mountain Climbers x 10 (Each Leg) Alternating Knee to Opposite Elbow Sit-Ups x 10 Use Dumbbell For More of a Challenge Russian Twist x 10 (Each Way) Use Dumbbell For More of a Challenge Leg Lifts x 10 Bend Your Knees to Modify Plank Hip Dips x 10 (Each Way) Jack Knives x 10 (Each Way) Straighten Arm and Leg to Make Exercise More Challenging