Reverse crunches
Lying leg raises
Bent-knee leg raises
Flutter kicks
Scissor kicks
Dead bugs
Mountain climbers
Plank knee tucks
Hanging knee raises
Captain’s chair knee raises
Toe taps
Hollow body holds
Bicycle crunches
V-ups
Stability ball pikes
Slow controlled pelvic tilts
Leg lowers
Forearm plank with knee drives
Ab wheel rollouts
Cable crunches with lower-body focus