What do you do with your forearm and elbow? Does it rest on your chair's arm (if so, what parts)? Is it suspended in air?

Do you pivot from a rooted elbow, or does your whole arm move horizontally?

I ask because I've been a very high sensitivity player for ~13 years and I'm trying out low sensitivity. Usually my entire arm is rooted on my chair's arm and all I ever moved was my wrist.

If I keep my arm on the chair then it creates resistance (basically negative acceleration?) after a certain horizontal distance, and if I suspend it in midair then it feels really tiring (though that may be an adjustability thing) and even 25cm/360 feels really high if I do that

I'm using an EC2 but I'm probably going to get an EC1 / DA / G400 / FK / AM to have a bigger mouse