Disagree. It encourages bunting/pushing the ball rather than accelerating through. Also many rec players are not in shape enough to hold their technique together with heavy racquets an entire match.
Your forearm shouldn't be doing much unless you are arming the ball and gripping tight.
Interesting. I stuggle to visualise how to apply this to the serve, does this mean we should arm the serve and not shoulder-over-shoulder pull the arm? Does this explain how Kyrgios can bomb serves with no real shoulder turn or leg drive?
I've given up with coaching. The last two coaches seemed to think a waiter's tray serve was fine lolwtfamipayingfor.
This. Add to that slowmo video is on most phones now, it becomes a game of spot the difference from a pro.
The tilt-the-shoulders then and going slightly across the ball seems to be the most effective for me after legs.
For low balls sometimes you just have to slice it though, no getting around the court surface. I'm not always too good at judging this though.
The only time there is too much spin is when they drop short.
A warmup is to get your stroke warmed up not some alterna-stroke to give them balls they want. Maybe they should warm up with a ball machine.