Sit-ups and crunches both target your core muscles, but work differently. You can use both exercises to build strength, endurance, and control.

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 ...