Warming up for strength: what the ramp is actually for

Ask ten lifters why they warm up and most will say some version of “to avoid getting hurt”. That is the weakest of the available justifications, and leaning on it tends to produce warm-ups that are long, unfocused and occasionally counterproductive.

It is worth being precise about why it is weak. It is not that warming up has been shown not to prevent injury — it is that the evidence is too thin and too varied to say much either way. A systematic review looking specifically at warm-up effects on both performance and injury found the modes and outcomes so heterogeneous that pooling them was impossible for almost every comparison. ⁴ Performance effects were reasonably consistent; injury prevention was not established one way or the other. Absence of evidence, not evidence of absence — but a poor foundation for building your whole warm-up on.

There are better reasons, and they suggest a different structure.

The performance case is the one that holds up best. A review of 32 high-quality studies covering 92 different warm-up and test combinations found improvement in 79 per cent of the measures examined, with little evidence that warming up harms performance. ³ Note what that figure is and is not: it is the proportion of measures that improved, not an amount by which performance improved. It is a consistency finding, not an effect size, and it is routinely misquoted as the latter. The same review flags that few well-conducted randomised trials exist, which is a fair caution on a practice this universally assumed.

One detail makes it directly relevant here: studies only qualified if the warm-up involved activities other than stretching. So this is evidence for active preparation specifically — which matters when we get to the stretching question below.

What warm-up sets are actually for

Rehearsing the pattern under increasing load. A heavy squat is a coordination task as much as a strength task. Working up through progressively heavier sets lets the nervous system calibrate: bar path, bracing pressure, foot position, how hard to push out of the hole. By the time you reach the working weight, the movement is already grooved that day.

Calibrating the day. How the ramp feels tells you what kind of session this is going to be. A warm-up weight that usually flies and today does not is useful information before you have committed to a heavy top set.

Raising tissue temperature and blood flow. Real, and worth a few minutes of general activity, but achieved quickly and not the main event.

Note what is missing from that list: exhaustion. A warm-up that leaves you tired has taken from the working sets rather than preparing them.

Building the ramp

A workable general pattern rises in percentage while falling in reps: something like eight reps at forty percent, five at fifty-five, three at seventy, two at eighty-five, then the working set. That is the progression our plate loader generates.

Two adjustments matter.

Scale the number of steps to the lift. A heavy deadlift or squat justifies more intermediate steps than a lateral raise. Isolation work with light loads often needs one warm-up set or none.

Scale to the load, not the exercise. The same lift needs a longer ramp on a heavy day than a light one. Someone squatting 200 kilograms needs more intermediate stops than someone squatting 60, because the distance from an empty bar is greater.

Rest between warm-up sets should be short early and lengthen as the load rises. There is no value in three minutes of rest after a set at forty percent.

The static stretching question

Holding a stretch for an extended period immediately before heavy lifting has been shown to transiently reduce force. The meta-analysis most often cited here pooled 104 studies and put the effect on maximal strength at about −5.4% and on explosive performance at about −2.0%. ²

Three details get lost when this is repeated. The effect on power specifically was −1.9% with a confidence interval crossing zero — which is to say, not statistically established, despite “stretching kills your power” being the usual shorthand. The impairment was unrelated to age, sex or fitness level, so nobody is exempt and nobody is especially vulnerable. And it is dose-dependent: the smallest effects were seen at bouts of 45 seconds or less.

The authors’ actual conclusion is narrower than the folklore too. They recommend against static stretching as the sole activity in a warm-up — not against stretching at all.

The practical conclusion is modest rather than absolute: long static holds immediately before a maximal effort are a poor idea, but a short mobility drill to reach a position you otherwise cannot is fine. If you need thirty seconds of ankle work to squat to depth, do it — the alternative is squatting badly.

There is a structure the literature actually recommends, and it is close to what most experienced lifters converge on anyway: submaximal aerobic activity, then large-amplitude dynamic stretching, then movement specific to what you are about to do. ¹ Static holds are not forbidden in that sequence — they are simply not the sequence.

Dynamic movement through the range you are about to load does not carry the same penalty and serves the rehearsal purpose better.

About the injury claim

Warming up is near-universally recommended for injury prevention, and the evidence for that specific claim is thinner than the confidence with which it is stated. Systematic reviews have generally found the performance benefits better supported than the injury-prevention ones, with the injury literature limited by study design and small numbers of events.

This is not an argument against warming up. The performance and calibration reasons are sufficient on their own, and there is no plausible downside to a sensible ramp. It is an argument against justifying it with a claim the evidence does not comfortably carry — which matters if you care about being accurate rather than merely conventional.

The bottom line

Ramp to your working weight in a few steps, dropping reps as load rises, and finish feeling prepared rather than tired. Use the ramp as a readiness check. Skip long static holds immediately before heavy work, and do whatever brief mobility you need to reach the position.

Then stop optimising it. The warm-up is not where training outcomes are decided.