Final answer:
Wrist curls are an appropriate exercise to develop muscle endurance for the wrist flexors. It involves curling a weight by flexing the wrist, targeting the wrist flexor muscles.
Step-by-step explanation:
An appropriate exercise to develop muscle endurance for the wrist flexors is performing wrist curls. Wrist curls involve holding a light-weight or a barbell with an underhand grip and curling the weight up by flexing the wrist. This exercise primarily targets the wrist flexor muscles and helps to improve their endurance.
Exercises involving wrist movement not only help in strengthening the muscles but also in maintaining joint flexibility. While focusing on endurance, the emphasis should be on longer sets with a comfortable resistance that allows for a higher number of repetitions without compromising form.