Hate sit-ups? Yeah, me too. These twists are far more effective anyway! You can either use a ball or plate - it's up to you.
1) Stand with your feet shoulder-width apart. Hold the plate/ball directly in front of you.
2) While holding the plate/ball, your elbows should be bent and close to your sides.
3) Twist your torso side-to-side, until the plate/ball has reached your hip. Keep your lower body still.
Tips: You want to the twists slowly and with control. Speed ≠ efficiency.
If you have any additional tips for this exercise, please let me know in the comments below and I will add them to this card and tag you in it. :)