@PenHoldSandro I have a question:
Are you talking about timing the legs, hips, core, weight transfer, torso, and arm movements to maximize impact into the ball on contact (overall power)?
Or are you talking about the timing of hitting the ball early (ball on the rise), middle (ball at the top of the bounce) and late (ball dropping)?
The second one is much easier to work with than the first. The second one, you just work on taking the ball on the rise, taking the ball at the top of the bounce, and taking the ball as it is coming down after the top of the bounce. Each of those has a value and a purpose. JO Waldner was famously quoted as saying that for a player to complete, he should be good at all three and use each when appropriate (in the right context).
For working on getting all the actions of your body to sync up so that you maximize impact into the ball on contact, it takes a decent amount of work on stroke mechanics. And many amateur players waste a lot of effort trying to hard but having the timing of the lower body and the upper body not sinked so that do these big movements but the power they are using 30-60% of it is not being timed with the contact of the ball. The effort from one part of the body is too early. The effort from another part of the body happens after ball contact (too late). And the result is, the player is using a ton of energy on each stroke that is not doing anything for the impact of the shot.
Then you watch someone with good mechanics, and, even with a very small, compact stroke, they can make the ball sizzle with spin and speed (power) with that tiny stroke because all the force they are using transfers from legs to hips to torso to arm to ball and the actions are synced up so that they get maximum power from a very brief and efficient effort.
