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 target your abdominal muscles, back muscles, and hip flexors, while crunches only target your abdominal muscles. • ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. If you’re new to exercise, managing balance issues, or have limited mobility and looking for a gentle way to stay active, chair ...