Eccentric wrist flexion with weight (Wrist flexion strengthening eccentric, with dumbbell, over edge, palm up - assisted lift)

Start in a seated position with your forearm resting on a table, holding a weight in your hand with your palm facing upwards.
Using the other hand, lift your wrist up, keeping your forearm in contact with the table.
Remove your other hand and then slowly lower your raised hand back down without support.
Relax and repeat.