Forearms
Watch Tutorial
https://www.youtube.com/shorts/Wk2839rUyuw
https://www.youtube.com/shorts/3cybxpxi-D4
https://www.youtube.com/shorts/gPr9WMLrIvQ
https://www.youtube.com/shorts/1LWJE_6o25E
Sit bench edge.
Hold DB each hand, palms up.
Rest forearms on thighs, wrists over knees.
Lower wrists.
Curl wrists up.
Keep forearms still.
Lower slowly.
Repeat.