45 Side Bend
45 Degree Side Bend
Side Bend on 45-degree Hyper Extension - Bodyweight or Weighted
Side Bend - 45 Degree Back Extension
3/4 sit-up
45° side bend
air bike
alternate heel touchers
assisted hanging knee raise with throw down
assisted hanging knee raise
assisted lying leg raise with lateral throw down
assisted lying leg raise with throw down
assisted motion russian twist
barbell press sit-up
balance board
bench dip (knees bent)
bench hip extension
body-up
bottoms-up
biceps narrow pull-ups