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 ...

For 30 days straight, I completed 1,000 bodyweight reps daily using nothing but grit and determination - no gym, no equipment. I rotated through push-ups, sit-ups, squats, and more to test my ...