Bicycle Crunches. You do not need any equipment. Ideally you need to be choosing exercises that engage your entire core and focus on improving your stability.
Just keep it relaxed, open up, keep the heart open, one leg goes in as the other leg goes out. The bicycle crunch is excellent for activating your rectus abdominis from all angles. Cradle the back of your head and upper neck with your hands.
Bicycle Crunches Get a Complete Ab Burn With This Quick Core Workout
Ideally you need to be choosing exercises that engage your entire core and focus on improving your stability. Ideally you need to be choosing exercises that engage your entire core and focus on improving your stability. By raising your legs, you also engage your transverse abdominis, which is a deep ab. This exercise primarily works the rectus abdominis and your external.