NST research

Should you stretch before exercising?

Static stretching can improve range of motion, but it is not the whole warm-up. Long holds can briefly reduce isolated maximal force; updated evidence does not support a blanket ban on stretching before sport.
Research-basedReviewed by Gabriel SilvaLast verified 14 September 2026Next review due 14 March 2027Report a correction

The evidence-led answer

The short answer

Static stretching can produce a small immediate increase in range of motion, but it is not uniquely required. Prolonged holds can temporarily reduce isolated maximal force when tested immediately; updated evidence does not show an overall impairment in jumping, sprinting or athletic performance, so a blanket ban is not supported.

Two different things: warming up vs stretching

Static stretching holds a lengthened position; dynamic stretching uses controlled movement through a joint range. Either can appear in a warm-up, but neither is synonymous with the whole warm-up.

What stretching before exercise actually does

  • Range of motion: a 2023 systematic review with pooled analysis found a single bout of stretching gives a small improvement in range of motion, not strongly changed by stretch intensity, technique, training status or sex.
  • It is not special: a 2024 systematic review found no significant difference in range of motion, stiffness or passive torque between stretching or foam rolling and other warm up activities. If the goal is just to feel less stiff before training, several routes get you there.

Does it hurt your performance?

Prolonged static stretching can temporarily reduce isolated maximal force, particularly after holds of about 60 seconds or longer tested immediately. A 2024 controlled pooled analysis did not find an overall impairment in jumping, sprinting or athletic performance, and its own authors describe their position as balanced rather than one sided: they say they cannot recommend stretching before performance on current evidence, but that avoiding it altogether is equally without evidence. Brief holds within a fuller warm up are unlikely to make a meaningful practical difference.

Does it prevent injury?

Stretching has not been shown to reduce overall or overuse injury risk. The main review on this point found no clear effect on all cause or overuse injury, though it separately recommends stretching plus dynamic activity within a warm up for reducing muscle strain specifically; that is a different, narrower outcome and a different intervention (stretching combined with dynamic activity, not stretching alone), so this reads as two distinct findings rather than the review contradicting itself. A dated hamstring specific Cochrane review (7 trials, 1919 people) reached a similar not enough evidence conclusion; one of those seven trials tested a warm up and stretching protocol directly in distance runners and found no significant effect on hamstring injury. The bigger problem may be evidential rather than negative: a 2024 review of 300 stretching trials found only five had measured any injury outcome at all, and only about a third of those trials even published a statement on competing interests, so this is a thin and often opaque area of the literature, not simply a mixed one.

A simple evidence informed warm up

  • Raise: begin with easy activity to lift temperature and heart rate.
  • Mobilise: dynamic movements taking the joints you are about to use through their range (leg swings, hip circles, arm swings, bodyweight squats).
  • Rehearse: build into the actual movement, lighter sets ramping towards your working load, or a few progressively faster strides before a run.

Dynamic stretching can be one part of a practical warm-up, but soccer-specific findings do not establish a universal formula. In low-certainty evidence, adding a conditioning activity after a comprehensive general warm-up produced only a trivial average incremental effect.

Flexibility as a separate goal

If greater range of motion is the goal, regular stretch training is one effective option. The review did not establish that stretching is the only route or that doing it while warm produces better long-term gains.

If something hurts

This article is general information, not medical advice. A stretch should feel like mild tension, not pain, stop at anything sharp or unusual. If you have a current or recurring injury, hypermobile joints, or a condition affecting connective tissue, get individualised advice rather than following a general routine.

Practical meaning

Begin with easy activity, use controlled movements through the ranges you need, then rehearse the activity at progressively greater effort. If a brief stretch helps, use it; do not mistake it for the whole warm-up or a general injury-prevention tool.

Limitations and uncertainty

Most evidence is acute and drawn from active, often young participants; a September 2026 search for general population (untrained) acute stretching data and for a non soccer dynamic warm up effectiveness review found neither, so both gaps remain open. Reviews overlap in authors and included trials: Behm, Kay, Blazevich, Konrad and Warneke recur across several of the performance and range of motion syntheses cited here. Injury outcomes are especially sparse (only 5 of 300 trials in one evidence gap review measured any injury outcome), and isolated maximal-force tests should not be generalised to all athletic performance. Separately, most of the underlying stretching literature does not report funding or conflicts of interest at all: a 2024 evidence-gap review of 300 trials found only about a third published a competing-interests statement and fewer than a fifth reported a funding source, so absence of a disclosed conflict in this field often reflects absence of reporting, not confirmed independence.

No product needed

This page is here to answer the question, not force a product.

Some research pages are deliberately product-free because adding a retailer link would not help the reader make a better decision. When a product is genuinely relevant, it appears after the evidence and is clearly labelled.

Evidence behind this page

What the evidence says, and where it stops.

Acute effect of stretching on range of motion

moderate confidence

A single bout of stretching produces a small, immediate increase in range of motion, not strongly changed by intensity, technique, training status or sex. Foam rolling and other warm up activities produce similar acute changes, so static stretching is not uniquely required to loosen up.

Study context and sources
Who it may apply to
Mostly active, often young participants. How well this transfers to older or completely untrained people is less clear.
Limitations
Acute effects only; the increase is small and does not last. Most evidence skews to active young people. Both sources behind this finding were read in full: Behm 2023 discloses non industry funding with no competing interests, and Warneke 2024 (foam rolling) declares no competing interests with no separate funding statement located.

Stretching duration and subsequent strength or power

moderate confidence

Prolonged static stretching can temporarily reduce isolated maximal force, particularly after holds of about 60 seconds or longer tested immediately. A 2024 controlled pooled analysis (full text read; both authors declare no competing interests) did not find an overall impairment in jumping, sprinting or athletic performance, and its own authors describe their position as balanced rather than one sided: they cannot recommend stretching before performance on current evidence, but say avoiding it entirely is equally without evidence. So the evidence does not support a blanket ban within a fuller warm up. Brief holds are unlikely to make a meaningful practical difference.

Study context and sources
Who it may apply to
Healthy active adults, often young; tasks are maximal strength, power and sprinting done shortly after stretching.
Limitations
Acute tests vary, older and newer reviews overlap, and isolated maximal force should not be generalised to all athletic performance. Two of the four cited sources, Behm 2016 and Kay & Blazevich 2012, were not read in full this pass (neither has a PMC deposit, and PubMed's copyright record shows no open access license for either; a direct fetch of Behm 2016's publisher page was also refused); their claims here rest on their abstracts only. Behm 2023 and Konrad 2024, cited for the range-of-motion evidence rather than performance, were read in full and both declare non-industry funding with no competing interests.

Before exercise stretching and injury risk

low confidence

Stretching has not been shown to reduce overall or overuse injury risk. The main systematic review on this point found static and PNF stretching had no clear effect on all cause or overuse injuries specifically (no data for dynamic stretching), while separately recommending stretching within a warm up for reducing muscle injuries, a narrower term. These may be two different outcome categories, broad all cause/overuse injury versus acute muscle strain specifically, rather than the source contradicting itself; the review's lead author frames the recommendation as being about muscle strain specifically in his own later public description of the work, though that is not a substitute for the primary paper's own methods and results. A dated hamstring specific Cochrane review (7 trials, 1919 people) reached a similar 'not enough evidence' conclusion across strengthening, balance training and warm up stretching. A separate evidence gap review of 300 stretching trials found only five had measured any injury related outcome at all, which is the more fundamental problem: there is not enough direct injury evidence, of any type, to draw a confident conclusion either way.

Study context and sources
Who it may apply to
Mostly team sport athletes for the injury prevention programmes; the Cochrane review is hamstring specific. Evidence differs for running, lifting and field sport.
Limitations
Only a small number of stretching trials report injury outcomes (five out of 300 in one evidence gap review), and that same review found most of the underlying literature does not even report its funding or conflicts of interest (34.0% published any competing interests statement, 18.0% a funding source) - a more basic limitation than any single source's own disclosure. The main review's abstract conclusion recommends stretching combined with post-stretch dynamic activity (not stretching alone) for reducing muscle injuries specifically, distinct from its separate null finding on all-cause/overuse injury; this reading is now supported directly by the abstract's own wording, not only by the university-authored public description used previously, though the full text (funding, conflict of interest, and exact methods) remains inaccessible behind a subscription. The Cochrane hamstring review (7 trials, 1919 people, PMID 20091605) is now confirmed accessible via an official PMC deposit (PMC13227905, not previously found) rather than only a direct page fetch; its plain-language summary specifies 4 of the 7 trials tested interventions aimed directly at hamstring injury with contradictory strengthening results, and one of the remaining 3 trials tested a warm-up/cool-down-and-stretching protocol in distance runners and found no significant effect on hamstring injury. Multicomponent injury prevention programmes cannot isolate stretching, strength or balance as a universal causal ingredient.

An active warm up before training

low confidence

A short active warm up (raise temperature with light cardio, mobilise through range with dynamic movements, then rehearse the actual movement at building load) is a defensible default. Dynamic stretching produced a small positive performance change in a 2016 review and about +3.5% on average in a review of soccer players, while a static stretch warm up reduced performance. The 'potentiation' benefit of a comprehensive warm up is trivial once a proper warm up is already done, so the structure should be presented as widely used and evidence informed rather than a proven formula for every activity.

Study context and sources
Who it may apply to
Dynamic stretch benefit is shown mainly in field sport (soccer) samples; general transfer is not established.
Limitations
The strongest supporting review is soccer specific. A general dynamic warm up / RAMP effectiveness review is still to be added (spec gap G2). Present as practice, not proof.

Stretching to improve flexibility over the long term

moderate confidence

Regular stretch training is one effective way to increase range of motion. The meta-analysis did not establish that stretching is the only route or that warmed muscles produce better long-term gains; it did not detect significant moderation by volume, intensity or frequency.

Study context and sources
Who it may apply to
Healthy participants across a wide age range; females gained more range of motion than males in subgroup analysis.
Limitations
Long term range of motion only. The review's author group overlaps with the acute stretching reviews used elsewhere in this article. It does not settle whether chronic stretching affects strength or hypertrophy.

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