Originally posted by Saturday Fever
If you don't train for a 1RM (ie like a powerlifter) then how can you accurately judge what is 80%. I'm not knocking anyone, just posing the question. If you never workout in a way that is intended to train and improve your 1RM, then you absolutely cannot accurately say "this is 80%." Because even if you dropped your usual routine and attempted a 1RM, it would not be a true 1RM because you did not train up to it. Your CNS will be a huge limiting factor. Just food for thought, I'm not trying to step on anyone's toes.
I agree, your 1RM is your 1RM and if you don't train to hit it then you have no idea what it really is. I do work in percentages with a lot of my clients but they are not profesional athletes, they are regular everyday people and hitting there 1RM is not important to them (as it is to someone like you or I). I do test to see what there 10RM is. Which is aprox. 75% of their 1RM (just an aproximation) and that helps me to very the intensity of workouts and periodize training without having to worry about trying to get them to max out (in most cases with the general public it is hard to get them to do a 15RM let alone a 1RM..lol). So, although the percentages don't really tell you what your 1RM is they can help you in someways....Stuff you already know I am sure but just some info for the others that don't workout with percentages.