Gym glossary

PR — personal record

Your best result in an exercise: the heaviest weight, more reps with the same weight, or the highest estimated max.

PR stands for personal record — a PB in British gyms. One exercise can have several: the heaviest single, more reps with the same weight (100 kg for 6 after 100 kg for 5), and the best estimated max from any set. The last is the handiest: it compares 90 kg for 8 and 100 kg for 5 in one number.

A record doesn't have to be heavy and scary. Beginners set records almost every week, and that's a normal sign that progressive overload is working. When records dry up for a month, that's a signal to look at your log, not a reason to test your max every day.

I spot records myself when you log a set: a new estimated max gets a flame, and the 1RM calculator works out the one-rep max from any set.

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In the diary I work out all of these numbers myself — you just log the set.

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