The size principle is the observation that motor units (and the muscle fibers they control) are recruited by the nervous system on an as need basis to meet and/or maintain a requisite force output.
formidable-pdfs domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/wp-includes/functions.php on line 6121The size principle is the observation that motor units (and the muscle fibers they control) are recruited by the nervous system on an as need basis to meet and/or maintain a requisite force output.