How to “arm” the thumb (and other fingers)?

::::::::: ▼::::::: TIMESTAMPS and LINKS ::::::::: ▼::::::: ● ENGLISH ● How take a “shortcut”? (not included in the video): https://aw4piano.info/en/technique/ba... ● FRANÇAIS ● Comment prendre “un raccourci” ? (non inclus dans la vidéo) : https://aw4piano.info/fr/technique/el... ● POLSKI ● Jak iść „na skróty”? (nieujęty w wideo): https://aw4piano.info/pl/technika/pod... 0:24 - This requires significant flexibility in the metacarpus… (point 1.3) 0:57 - the extreme positions of hand “arming” - with the metacarpal knuckles either maximally flattened or prominently raised… (point 1.4.) 1:21 - My first professor, Bolesław Woytowicz, played with such a hand position… (point 1.5.1.) 1:44 - Ignacy Jan Paderewski also used a strongly flattened hand (point 1.5.2.) 1:51 - The rule of soft finger landing on the keys (point 2) 1:57 - This is precisely what Liszt meant when he said: “Grab the chord, drawing the fingers slightly inwards… (point 2.2.) 2:04 - this movement that can be compared to “arming” or “activating” the finger - it resembles stretching a spring (point 3.1.2.1.) 2:26 - This “arming” is particularly important when we are changing the hand’s horizontal position on the keyboard - e.g. playing scales and arpeggios* (point 4) 3:33 - …it must be stressed that PERFECT ARM SUSPENSION in the shoulder and impulses from the shoulder are essential for the correct execution and coordination of these movements (point 5) PLAYLIST -    • “Fly swatters” i.e. throwing movements   3:39 - Watching my video examples, you may notice that except in the places where I deliberately exaggerate the thumb arming, this technical element is either almost or completely unnoticeable. Why? (point 6) CHAPTER “The whipping (throwing) movement” - https://aw4piano.info/en/technique/th... PLAYLIST -    • Shoulders activation (arm suspension)   ● More details available for my students.