The short answer
Static stretching before a run does not appear to reduce your risk of injury. That’s the clearest finding in this area, and it has held up across multiple reviews.
Almost everything else about stretching is less settled than either camp claims, including the now-fashionable position that stretching before exercise ruins your performance. Both the “always stretch” advice and the “never stretch” backlash have outrun the evidence.
What the injury-prevention research found
The most-cited work here is a systematic review of static stretching as part of a warm-up,1 which examined randomized and controlled clinical trials of stretching for preventing exercise-related injury.
It concluded that there is moderate to strong evidence that routine static stretching does not reduce overall injury rates. All four randomized controlled trials found static stretching ineffective for reducing exercise-related injury.
A broader review of the literature2 reached a similarly deflating verdict: there isn’t sufficient evidence to endorse or discontinue routine stretching before or after exercise for injury prevention among either competitive or recreational athletes.
One nuance is worth keeping. There’s preliminary evidence that stretching may reduce musculotendinous injuries specifically (muscle strains and tears), even while showing nothing for overall injury rates. That distinction matters more for sprinting and field sports, where hamstring strains are common, than for the overuse injuries that dominate distance running. Shin splints and runner’s knee are bone and joint loading problems, and no amount of stretching addresses the load.
The performance question is murkier than you’ve heard
You have probably been told that static stretching before exercise measurably reduces power and should therefore be avoided. This became conventional wisdom quickly, and it deserves more skepticism than it gets.
A recent systematic review with multilevel meta-analysis3 revisiting the “stretch-induced force deficit” makes the important methodological point: effect sizes in earlier reviews were drawn substantially from studies lacking proper control conditions or pre-post designs, and once you account for that, the effects come out trivial.
For a distance runner this is close to academic anyway. The stretch-induced force deficit, to whatever extent it’s real, concerns maximal force and power output over seconds. It has little bearing on running at conversational pace for half an hour. If you enjoy stretching before you run, the evidence does not give anyone grounds to tell you to stop.
What to do before a run
A more useful question than “stretch or not” is what a warm-up is for. Warming up raises muscle temperature, increases blood flow, and rehearses the movement pattern. Static stretching does the third of those poorly and the first two barely at all.
For an easy run, the whole warm-up is to walk first, then run slowly. That’s what Couch to 5K builds in with its five-minute brisk walk. Beginning at a pace that feels almost embarrassingly slow and letting it drift up over ten minutes achieves everything a warm-up needs to.
If you’re doing anything hard, add dynamic movements. Before intervals or a race, five minutes of controlled movement through range prepares the tissue in a way static holds don’t. It’s worth doing when the session is intense, and optional before a gentle 30 minutes.
Long static stretches on cold muscles aren’t dangerous, but they aren’t doing what you think, and the time is better spent walking.
A dynamic warm-up that takes five minutes
If you’re heading into a hard session or a race, this is the version worth doing. Each movement is done for 10–12 repetitions per side, moving continuously rather than holding anything.
- Leg swings, forward and back. Hold a wall or post and swing one leg freely, letting range increase over the set rather than forcing it from the first rep. This mobilizes the hip in the plane you run in.
- Leg swings, side to side. Same position, swinging across the body, which targets the adductors and lateral hip, the tissues that resist pelvic drop.
- Walking lunges. Take a long step, back knee toward the floor, torso upright. This loads the hip flexor of the trailing leg through range under control.
- High knees and heel flicks, 65 feet (20m) of each. These rehearse the running pattern at a higher cadence than you’ll use, which wakes up the neuromuscular side of things.
- Strides: four to six accelerations of 65–90 yards (60–80m), building to near-race pace and easing off. People often skip this part, but it matters most before a hard session because it bridges the gap between warm-up jogging and the first hard interval.
The logic throughout is movement through range rather than a position held at end range, and that is what separates a dynamic warm-up from stretching done standing up.
What about foam rolling?
Foam rolling sits in a similar evidential position to stretching. It has short-term effects on perceived stiffness and range of motion, but no convincing evidence that it prevents injury or speeds recovery.
Where it differs usefully is that the range-of-motion effect appears without the acute force reduction sometimes attributed to static stretching, which makes it a reasonable pre-run option if you feel you need to loosen something up. Post-run, it’s mostly a comfort measure.
Treat it the way you’d treat post-run stretching: worth doing if you like it, not worth feeling guilty about skipping, and no substitute for the strength work.
And after a run?
Stretching after a run won’t prevent tomorrow’s soreness. Delayed onset muscle soreness is not meaningfully reduced by post-exercise stretching, even though preventing it is the most common reason people stretch.
That leaves two good reasons to stretch afterward. The first is to maintain or improve range of motion. If you have restricted movement somewhere (limited ankle dorsiflexion is a common one in runners, and it affects how you absorb load), regular stretching does increase range, and post-run, when tissue is warm, is a sensible time to do it. Treat it as a training intervention with a specific target rather than a ritual.
The second is that it feels good, which needs no evidence base. If five minutes of calf and hip flexor stretching at the end of a run makes you more likely to run again tomorrow, that adherence effect outweighs anything in the literature.
What reduces running injuries
If you want the ten minutes to count, spend it on the things with better support behind them:
- Managing load progression, the strongest modifiable risk factor in the literature (see building weekly mileage safely).
- Strength training. Hip and calf strength have far better evidence for injury prevention than stretching does.
- Rest days, because adaptation happens between sessions (see active recovery vs rest days).
- Running easy runs easy (see why easy runs should feel easy).
None of these are as satisfying as a warm-up ritual, which is probably why stretching retains its reputation.
How to spend your ten minutes
Static stretching before running does not reduce overall injury risk, and that finding is well supported. The claim that it wrecks performance is weaker than commonly stated: recent meta-analysis puts the effects at trivial, and they’re largely irrelevant at easy running pace.
So warm up by walking, then running slowly, and save dynamic drills for hard sessions. After the run, stretch if you want to improve a specific restricted range or simply because you enjoy it, but not in the hope of avoiding soreness. Load management and strength work are where the injury-prevention evidence is.
This article is general information, not medical advice.
References
- Small K, McNaughton L, Matthews M. A systematic review into the efficacy of static stretching as part of a warm-up for the prevention of exercise-related injury. Research in Sports Medicine, 2008. tandfonline.com
- Thacker SB et al. The impact of stretching on sports injury risk: a systematic review of the literature. Medicine & Science in Sports & Exercise, 2004. pubmed.ncbi.nlm.nih.gov
- Warneke K, Lohmann LH. Revisiting the stretch-induced force deficit: a systematic review with multilevel meta-analysis of acute effects. Journal of Sport and Health Science, 2024. pubmed.ncbi.nlm.nih.gov
