Abdominals, Core
Obliques
Watch Tutorial
https://www.youtube.com/shorts/4nfbynZ53Ac
https://www.youtube.com/shorts/A0TScZ8bwU0
https://www.youtube.com/shorts/n0EyclstplU
Lie back, knees bent, feet flat.
Hold weight (plate/DB/med ball) on chest or behind head.
Lift head/shoulders off floor.
Crunch abs.
Lower slowly.
Repeat.