Abdominals, Hip Flexors
Obliques, Core
Watch Tutorial
https://www.youtube.com/shorts/2WDv-G0cLbY
https://www.youtube.com/shorts/waIXZ0LA1YE
https://www.youtube.com/shorts/xMR7Z9ZeJG0
https://www.youtube.com/shorts/4KEyIUYe6v0
Lie flat back, arms sides or under glutes.
Engage core, press low back down.
Lift head/shoulders slightly (optional).
Lift straight legs few inches.
Alternate kicking legs up/down small motion.
Keep legs straight.
Continue.