- Start by sitting on the floor, with your knees bent and feet flat on the ground.
- Grab a light kettlebell or medicine ball in your hands.
- Then lean back so your upper body is at a 45-degree angle to the floor. Keep your back straight at this angle throughout the exercise, as it will be tempting to hunch your shoulders forward.
- Tense your core and raise your legs off the ground.
- Rotate your arms all the way over to one side, then do the same in the other direction. This is one rep.
- Repeat for 20 reps or for a minute.
