Hi there I've previously been casually involved in strength training as a hobby, at my strongest I was 6' and 215lbs so certainly nothing much but I do know I have the ability to grow even without a real plan or proper nutrition. I have decided to give HST a go after nearly 2 years out of the gym and I'm a little more committed to eating properly, etc. I'm prepared to follow the program to the letter but I have a question about the calculation of max weights for each of the rep ranges. It seems to me there is something inherently inaccurate about trying a weight, waiting a few minutes then trying again until you manage to hit on what seems to be your max weight for a given rep range. So many variables including CNS exhaustion, partial hypertrophy, psychological factors, etc, seem to come in to play, making it near impossible to figure out what the "true" limit of your strength is. With that in mind, how accurate are the various 1rm calculators floating around the web? They seem to give a fairly standard formula for calculation of max weight for any given rep range, and, while they don't totally remove the complexities and potential inaccuracies of testing in the gym, surely they would at least amelioriate them, provided of course the formula they rely on is accurate (which I guess is the pertinent question). Any comments would be great.