I think whenever you feel tired, which I'd describe as your body not being able to perform the proper technique. In other words, I'd think you want to maintain the ability to build muscle memory, and not get sloppy, resting as often as it takes. The rests might be as short as a few (say 30) seconds, depending what you're working on.
The science would seem to indicate that you should take a break when you can’t maintain the focus required/desired. To set a time on it is problematic. Current teaching/learning science, from what I have read/understood, perhaps suggests a break every 15-20 minutes will give good development for the broad middle section of the bell curve on a graph of exercise physiology development.
Whenever you feel tired OR getting too quickly frustrated! and I remember from my years of riding horses that if you get some thing right you don’t necessarily have to continue getting it right repeatedly! In other words don’t practice something to the point that you then start over analyzing what you are doing
A brake ever 10 minutes is needed so you don’t over work the muscle group you are using
I think whenever you feel tired, which I'd describe as your body not being able to perform the proper technique. In other words, I'd think you want to maintain the ability to build muscle memory, and not get sloppy, resting as often as it takes. The rests might be as short as a few (say 30) seconds, depending what you're working on.
The science would seem to indicate that you should take a break when you can’t maintain the focus required/desired. To set a time on it is problematic. Current teaching/learning science, from what I have read/understood, perhaps suggests a break every 15-20 minutes will give good development for the broad middle section of the bell curve on a graph of exercise physiology development.
What does science actually show us?
Whenever you feel tired OR getting too quickly frustrated! and I remember from my years of riding horses that if you get some thing right you don’t necessarily have to continue getting it right repeatedly! In other words don’t practice something to the point that you then start over analyzing what you are doing