Lie with your back flat on the floor with your knees bent, feet on the ground. If you struggle to keep your feet flat on the ground, you can be on your heels instead.
Grab a dumbbell or kettlebell and extend your arm straight out in front of you. Your free arm can go wherever is comfortable for you.
Use your abs to sit up as much as you can. As you sit up, keep your arm extended over you. At the top of the sit-up, the weight should now be directly over your head.
Once you sit up as high as you can, slowly lower your upper body back to the floor, keeping your arm extended over you.
Keep your abs tight throughout the entire motion.
Complete 8-12 repetitions with one arm, then switch to the other arm and complete another 8-12 repetitions.
