In this video, I explain what a 1RM actually is, why it's useful to know your 1RM, and - of course - how to test your 1RM. But I also cover how frequently you should test your 1RM, if you should test the 1RM for multiple exercises in the same session, and how you should train after a 1RM test. Additionnally, I show you an example leg workout you could do after your squat 1RM test.
Thus, this video is a comprehensive resource for everything related to one-rep maxes, with this guide condensing all the information in a few pages.