Both sit-ups and crunches can help target your core muscles, but there are key differences between the two ab workouts.

Neurosurgeon Dr Richard Veyna highlights nine common gym exercises and ranks them by their safety for our spine, including ...

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 ...