Build strong core muscles without weights, just using these three crunch variations from a functional training coach.

Build endurance and core muscle simultaneously with this three-move ab workout — without crunches ... work well with a medicine ball or cable machine with the pulley set to the highest point.

Knowing how to do ab crunches and sit ups with the proper technique can mean the difference between getting a six pack fast or getting a neck strain. Bad posture during sit ups is a constant ...

The exercise is a variation of an ab crunch, where one leg flexes while the other extends. At the same time, there is rotation at the lumbar spine – the part of the spine in your lower back ...

Crunches are a great way to work your abdominal muscles, but if you just can’t get on board with them – because, let’s be honest, they’re not the easiest exercise or that fun – there are ...