Russian twist
How to do it:
- Sit up straight with your knees bent and feet in front of you.
- Lift your feet about a foot off the ground and engage your core.
- Twist your entire upper body to one side, keeping your legs in front of you.
- Repeat on the other side. Do 10 reps on each side.
Tip: Hold a dumbbell or medicine ball for extra intensity.
Muscle targeted: Obliques