- Beginners:
No matter what age. Learn form and efficiency early to create a solid framework for the future. It is easier to learn correctly early on than to try to reprogram your brain and muscle memory later.
- Players coming back from an injury:
If you have constant injuries (i.e., elbow, wrist, shoulder, knees, etc.) it would be worthwhile to consult a pro. He or she may be able to see if there is something mechanical you are doing that can be causing your problems.
- Players coming back from a lay-off:
You took off for more than 2 weeks, due to any number of reasons. This is a great time to take a lesson to start back gently and get a gentle refresher of correct form and help your timing. This may help prevent you from developing bad habits that can come with some frustration often experienced when starting to play again after an absence.
- Older players with much experience:
As players age, maintaining a level of play is advantageous. Many players, upon reaching a certain level, rest on their laurels. Thus, they see their game gradually deteriorate or see younger players passing them by. Taking lessons and maintaining your fitness can greatly aid in helping you maintain your level of game.