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

Sit-ups may seem old-school, but they remain one of the most straightforward and revealing measures of real-world core strength. In just a single minute, you can test your endurance, mobility, and ...

The classic sit-up is a workout staple. Whether you've become all too familiar with the movement in your weekend HIIT class or eked out those last few reps while following a home workout video, you've ...