Originally Posted by toly
For example, Lock&Roll coach emphasizes too much importance of the hips and body rotation. But, when he demonstrates FH, his arm and its parts (including wrist) are very active. That’s why I dislike his monkey’s drum idea. IMO he puts wrong accents in his explanations.
That's most likely due to assumption, that novice/recreational players use their arm only, and hips/body rotation is counter intuitive and thus must be overemphasized.
I personally think it's a good way to start, as developing proper fundamentals is difficult (counter intuitive, energy inefficient) yet essential. But once body starts moving and working, it's time to explore those 85% that accelerate racquet head through the contact point.