Why is twenty minutes the standard?

It is long enough to be a complete session and short enough to stay above a jogging effort. Past twenty, the sustainable pace drops to something that trains endurance rather than work capacity.

How should twenty minutes feel?

Uncomfortable but steady from about minute four onward. If minute six feels desperate, the start was too fast by a wide margin.

How many rounds should I expect?

Between twelve and twenty for a round that takes about a minute. The absolute number matters far less than beating your own previous attempt.

Timer · preset of amrap timer

20 minute AMRAP timer

A twenty minute cap, the standard length. Long enough that the pace has to be one you could almost hold all day.

Open the full amrap timer to change anything this preset fixes

The timer

Lead-in

Time cap: 20min

Stations, one per line

Named stations appear on the clock as they come up. Leave it as it is to run one unnamed block.

The clock runs fullscreen and keeps the screen awake. It needs JavaScript, so with scripting off the plan below is the whole session written out.

Total: 20:10
Working: 20:00
Periods: 2

01ReadyGet ready0:10
02WorkAMRAP20:00

How it works

Twenty minutes is the standard AMRAP cap, and it is standard because it sits at the far edge of what can still be run hard. The sustainable pace for twenty minutes is close to a pace you could hold much longer, which is what makes the format a work capacity test rather than a sprint.

The first four minutes should feel too easy. Almost every twenty minute AMRAP that goes badly went badly in the first four minutes, and no amount of effort later recovers the rounds lost to a collapsed pace.

The best known example is twenty minutes of five pull-ups, ten push-ups and fifteen squats. Rounds in the mid teens is a strong result, and the number is worth writing down.

Come back to the same round and cap two months later. That comparison is the only honest measure of whether the training in between worked.

Questions

Why is twenty minutes the standard?: It is long enough to be a complete session and short enough to stay above a jogging effort. Past twenty, the sustainable pace drops to something that trains endurance rather than work capacity.
How should twenty minutes feel?: Uncomfortable but steady from about minute four onward. If minute six feels desperate, the start was too fast by a wide margin.
How many rounds should I expect?: Between twelve and twenty for a round that takes about a minute. The absolute number matters far less than beating your own previous attempt.