Known as the Dumbbell One Arm Prone Curl, this is a curl variation using a dumbbell, performed prone. A biceps isolation move that curls a dumbbell up and down through a controlled elbow hinge. Because the range is fixed, it's an easy way to add volume without extra fatigue elsewhere.
Log your dumbbell one arm prone curl sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.