Flutter kicks are the seated ab exercise you need if you’d like to build stronger lower abs, hip flexors and quads ...

Leg lifting exercises are efficient at targeting your lower abdominal muscles — think leg raises or reverse crunches, for ...

So, these are called flutter kicks. Then what we're going to do is ... You don't want to go too high because then you're not engaging your abs. You want to keep your feet down about 6 inches ...