One Rep Max (1 RM)
[Edited 2018-01-30 –
Here are a better set of standards which are age adjusted].
In weightlifting the maximum weight that a person can do of a particular lift is called a One Rep Max (1 RM). There are standards for the 1 RM which are divided by levels of training (Weightlifting Performance Standards). These standards are also divided by gender and body weight. So, for instance, a male who weighs 181 lbs and is untrained should be able to deadlift 150 lbs. This is helpful for determining the weight a beginner should be lifting as well as the progressions they they should be making/should expect. As that same person moves from Untrained to Novice he should be moving from the 150 lbs to 275 lbs.
Levels of Training
From that page:
Higher levels are beyond the discussions in this page.
There are calculators which can be used to predict a One Rep max based on the number of lbs lifted in a larger set. So, for example, if you can do 5 reps unbroken of 65 lbs that corresponds to a one rep max of 73 lbs. Here are the various numbers this corresponds to:
At CrossFit they list a prescribed (Rx) weight for males and females. These are based on a 1 RM (1 rep max). There is a single number prescribed for males and a different, single number prescribed for females.