Should You Warm Up Before Exercise? What the Research Actually Shows

Most people either skip the warm-up entirely or spend five minutes doing the same static stretches they learned in school PE. Neither approach is particularly useful, and one of them might actually be making things worse.
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Here's what the evidence actually shows — and what a good warm-up looks like in practice.

Do you actually need to warm up?
Yes — but perhaps not for the reasons you think. The traditional justification for warming up was injury prevention, and while there is evidence supporting this, the research is more nuanced than "warm up or you'll get injured." The more compelling argument for warming up is performance: a properly warmed-up muscle produces more force, contracts more quickly, and fatigues more slowly than a cold one. In other words, you'll train better if you warm up, regardless of your injury history.

The injury prevention case becomes considerably stronger as we age. From our mid-thirties onward, muscles take longer to reach optimal temperature, tendons and ligaments are stiffer at rest, and the window between "cold and sluggish" and "ready to work" is longer than it was at twenty. If you're forty-five and jumping straight into a heavy lifting session or a hard run, you are meaningfully increasing your injury risk compared to someone who takes five minutes to prepare.

What static stretching before exercise actually does
Here's the research that surprises most people: static stretching — the kind where you hold a stretch for twenty to thirty seconds — performed immediately before exercise has been shown to reduce muscle force production and power output. In practical terms, spending ten minutes holding deep stretches before a run or a strength session may actually impair your performance in that session.

This doesn't mean stretching is bad. It means pre-exercise is not the right time for it. Save sustained static stretching for after training, when the muscles are warm and pliable and you're not about to ask them to produce maximal force.

What to do instead
A good warm-up has three components, and the whole thing should take five to ten minutes at most.
Start with light cardiovascular activity to raise your core temperature and increase blood flow to working muscles. This doesn't need to be complicated — a brisk walk, slow jog, easy cycling or even marching in place achieves the goal. The target is to feel slightly warm and have your breathing elevated, not to start sweating or fatigue yourself before the main session begins.

Move into dynamic stretching — controlled movements that take your joints through their full range of motion without holding the end position. Leg swings, hip circles, arm circles, trunk rotations, ankle and wrist circles all qualify. The difference between dynamic and static stretching is movement: you're flowing through the range rather than holding it. This prepares the joint for the ranges it will encounter during training without the performance-reducing effects of static stretching.

Finish with specific preparation for the activity itself. This is the component most people skip and arguably the most valuable. If you're about to run, add some high knees, heel kicks and short accelerations. If you're lifting, do a light set or two with reduced load before your working weight. If you're playing sport, do some sport-specific movement patterns at gradually increasing intensity. The goal is to progressively close the gap between "warm body at rest" and "body performing the specific demands of the session."

A note on recovery from injury
If you're returning to exercise after an injury, or have a history of a recurring problem, your warm-up may need to be more specific than the general approach above. A physiotherapist can help you identify which structures need the most preparation before training and what specific movements will reduce your risk of re-aggravating the problem. This is particularly important for people with tendinopathies — Achilles, patellar, rotator cuff — where the warm-up can meaningfully affect how the tendon responds to the session that follows.
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If you have questions about how to warm up for your specific activity or injury history, our team at Articulate Physiotherapy in Tarragindi would be glad to help. Book an appointment online or call us on 07 3706 3407.