Here is your move of the day, the perfect exercise for a strong core:
There are multiple variations of this exercise.
You can do it with straight legs, with an exercise ball, full movements, half movements, etc.
With this version of the crunch, there is a smaller risk of injury and it puts less strain on the neck.
Make sure you contract your abdominals and push your heels toward the ceiling.
Combine this with planks and bicycle crunch and you will have a stronger core in no time! Enjoy :)