What is double progression?

Every exercise gets a rep range, for example 8 to 12 reps, and a number of sets. You pick a weight you can lift for at least 8 reps on every set, with a rep or two left in the tank.

Then you progress in two directions, one after the other:

1. Reps first. You keep the same weight and try to do one more rep than last time, until every set reaches 12.
2. Then weight. Once every set hits the top of the range, the weight goes up by the smallest step you have, usually 2.5 kg on a barbell. Your reps drop back to around 8, and you build them up again.

That’s the whole method. It works because you never have to guess when to go heavier: the reps tell you.

Say you bench press three sets with a rep range of 8 to 12. Over five sessions it could look like this:

Session 3 doesn’t count as “done” yet: only the first set reached 12. The weight goes up only when every set reaches the top of the range. That keeps one good set from pushing you up too early.

Muscles and strength grow when you ask a little more of them over time. That principle, progressive overload, appears in major position stands, such as the ACSM’s.¹ There are two simple ways to ask for more: more reps at the same weight, or more weight.

Double progression uses both. In a 2022 study, 43 people with at least a year of training spent eight weeks either adding reps or adding weight. Both groups gained muscle and strength at a similar rate.³ And lighter and heavier weights build a similar amount of muscle, as long as the sets are hard enough.⁴ So spending a few weeks working through a rep range isn’t time lost.

The bigger advantage is practical. The weight only goes up after you’ve shown you can handle the current one for the full range. Jumps stay small, your technique stays clean, and you always know what to aim for next session.

Use the smallest jump your equipment allows. On a barbell that is usually 2.5 kg (1.25 kg plates on each side). Machines and dumbbells often go up in bigger steps.

A big step can be a problem on light exercises. Going from 10 kg to 12.5 kg on a lateral raise is a 25% increase, and your reps will crash. In that case, go a couple of reps past the top of your range first, then make the jump.

One bad session happens: poor sleep, a busy week. Just repeat the weight. But if you fall below the bottom of the range two sessions in a row, the weight is too heavy for now. Take about 10% off, start at the bottom of the range again and build back up.

If you stall for longer, the cause is usually outside the exercise itself: recovery, food, or too many hard sets in a week. What to do when you stop progressing goes into that.

Linear progression adds weight every session, at a fixed number of reps. It works very well for beginners, because they can recover from it and their strength climbs fast. After a few months, most people can’t keep adding weight every time.

Double progression is slower but lasts much longer, because the reps give you a smaller step between weight increases. Many coaches start beginners on something close to linear progression and switch to double progression once that stops working.²