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 ...

Sit-ups have seemingly been a staple in our training programmes since time began. Despite their omnipresence, they are perhaps one of the most hated exercises to grace our Google searches, aside from ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Bored of planks and crunches? Why not try mixing things up with a killer ab ...