Sit-ups put a significant amount of force on your lower back. Even more, it reinforces the hunched over posture we spend too much time in throughout the day, which can have negative effects on our posture, breathing and core strength.

Exercises that require core stability actually activate the core musculature to a greater extent than exercises like crunches. The right kind of exercises done properly decrease the stress on your back, improve your posture, improve your performance and help build impressive abs.