Ditch sit-ups - strengthen your core with these three moves instead

A woman doing a core workout at home

A core workout isn't a core workout without a healthy serving of sit-ups and crunches, right? Wrong! 

If you're bored of these two moves, there are plenty of other options for strengthening your midsection muscles. You can try most of them at home without any equipment too (although a yoga mat can be handy for extra cushioning and grip).