When most people think of a strong core or achieving abs, the first exercise that comes to mind is often sit-ups. While sit-ups have long been a go-to for strengthening the core, they're not always ...

If you've ever wondered (mid-crunch, most likely) exactly how many sit ups you should be doing every day to optimise your fitness, then you're in the right place - this is exactly the type of question ...

Add Yahoo as a preferred source to see more of our stories on Google. Credit: Getty Images GHD sit-ups are the type of advanced abs exercise reserved for those in the gym who like to send their core ...