In this video, you will learn how to do eccentric wrist flexion with a weight.
1. Start with your forearm resting on something such as a table
2. Hold a weight in your hand with your palm up
3. Using your opposite hand, raise the weight up
4. Once at the top position, remove the opposite hand and lower the weight slowly to the bottom position
You can do this in a kneeling position as I show here or you can use a chair as long as you set it up the same.