Reverse crunch: 3 sets of 15-20 reps ? Front plank with arm/leg lift: 3 sets of 60-90 seconds per side ? Weighted Russian twist: 3 sets of 20-25 reps per side ? Bicycle crunch: 3 sets of 20-25 ...

Twist your torso, bringing the weight toward ... Make sure to complete on both sides. Start in a high plank position with two dumbbells resting on the mat right above each hand.