ATP Pro Technique
This appears to be a good analysis of the mechanics of a functional and reliable forehand. I was never a proponent of using the wiper blade description as the best visual approach to getting a solid stroke.
If you look at the mechanics of this stroke it conforms to classic forms.
The finish is what tells the story. Your finish allows a safe way to dissipate the remaining energy in the stroke without applying that force against your joints, muscles, and limbs. A relaxed finish that comes around gives the impression that there is a lot of vertical wrist action in the motion.
Wrist movement on the stroke is a guarantee of eventual wrist injury. I learned this at 7 years of age after watching a TV match where the ill informed announcer pontificated on how Laver used his wrist to generate all that extra spin so that is what we should all do. I went out and tried it and within twenty minutes had a wrist injury. So much for wrist action on forehands. Save yourself and focus on timing a motion that generates a strong upward lift starting from a position lower than the ball and finishing high and forward rather than emulating the reverse finish method used by Nadal as an example. Later, if you want to increase velocity and have hardened your body against this type of injury you can work on adding some additional motion as shown below that appears as more of a wrist extension rather than a rotation. Wrist rotation seems to be the key to injuries.
Left and Right Hand Together Forehand - elbow slightly out
This is also good advice since it forces a good shoulder rotation and turning sideways. At least he says limit the wrist action until your skills are up beyond the basic level. Of course the wrist can generate velocity but with it comes directional change so unless your judgement and timing are superb the wrist can as he mentions it, make your stroke squirrely.
I would say that is why most players that are in the 2.5-4.5 level of play are better off keeping the wrist out of their game and focusing on directional control and depth, and especially if you're a club and league player with no pretensions or expectations of becoming a tournament player. It will be a lot easier on your body especially as you age and injury risk becomes more obvious.
Use your own judgement on this, but if you decide to go wristy I'd also suggest adding wrist support bands. I found them very useful.
This is a good example but not necessarily a recommendation. I haven't used this version.
