I've been practicing scales for some time now, and I found them mostly easy and fun to play. The problems begin when I have to play them faster, but oddly enough my problem manifests only when playing towards the thumb, that is descending scales in the right hand and ascending scales in the left.
Take for instance F major in the right hand. I start with my thumb on the F, and as soon as the 2nd finger hits the G, I start raising my hand ever so little, so by the time the 4th finger reaches B flat, the thumb is raised in the air and closely following the playing finger, ready to quickly drop on the C from the next group. The same thing happens when transitioning from E to F in the next octave, and I can play the scale comfortably and quickly.
The problem is on the descend. Starting from the 4th finger on the F, as I get closer to the thumb on C, my hand seems to want to stay immobile, and when I get to C, I have to to this weird sweeping movement to get my 4th finger onto the B flat. Admittedly, the distance when transitioning from the thumb on F to the 3rd finger on E is not as large, but the problem is also noticeable and it prevents me from playing the descend as fast as the ascend.
I noticed there's a lot of flame wars with people arguing over "the best" way of playing scales, most of which has to to with "thumb-over" and "not-thumb-over". There are also a lot of YT videos where people try to "teach" you the best (in their opinion) way of playing scales. Most of them can't really play the scales that well to begin with. It's tough to filter out all this crap, especially since I've had no formal piano education and I've no idea what is plain established. Could someone clarify how people in regular, good music schools are taught to play the scales on the descend? A video would be useful also. Thanks a lot!