I am sorry but I have to disagree. CT advocates a training max, a weight you can hit solidly 95% of the time, because a true 1RM will happen once in a blue moon, on a magical day where everything went perfectly etc thus as the program continues the weight prescribed might not be doable or with an improper form. I quote him, from his Facebook page (28th of february):
" In the world of training we often confuse personal record (PR) with personal best (PB).
The PR, to me is almost worthless when it comes to planning training sessions and progressions while the PB can be really useful. In fact using your PR to establish progression and which weights to use for your sessions can do more harm than good. Let me explain.
A PR is the most weight you moved in a lift. Form doesn't matter as long as it went up and respected the rules (e.g. if you lift you butt off of the bench in a bench press it doesn't count). It can be an ugly lift but if you complete it, it counts as a PR
A PB is the best you can do with perfect form and that you can repeat, which is why I call it a personal "best", whereas the PR is often a one-shot deal.
The problem is that a PR that was done with improper form, or on a magical day where everything went right, can give you a false sense of where you are at, strength wise. And this can result in an erroneous selection of training weights and unrealistic progression expectations.
If you base your decisions (how much weight to use, how much to add at every session) on a lift done with bad form, mostly out of pure pride, you will hit the wall really fast. You should use the heaviest lift you can do with PERFECT form to evaluate your true strength."