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 ...

What are sit-ups, and why are they a high-risk exercise? An abdominal endurance training exercise, sit-ups help strengthen, tighten and tone the abdominal muscles. It is often done by gym-goers who ...