How to warm up before a workout, done right

Knowing how to warm up before a workout properly means more than a few random stretches — a good warm-up raises your body temperature, increases blood flow to the muscles you are about to use, and rehearses the movement patterns of your workout, and it only takes five to ten minutes. It is one of the simplest changes you can make to any routine, yet one of the most commonly skipped.

Why warming up matters

A cold muscle and joint moves through a noticeably smaller range with less coordination than a warmed-up one. A proper warm-up gradually raises heart rate and muscle temperature, improves joint mobility, and primes the nervous system for the specific movements coming up — all of which are linked to better performance and lower injury risk in the working sets that follow, particularly for heavier compound lifts.

Dynamic warm-up vs static stretching

A dynamic warm-up uses continuous, controlled movement — leg swings, arm circles, bodyweight squats — through a full range of motion, gradually increasing intensity as the movements continue. Static stretching means holding a single stretch position still, without movement, for roughly 15–60 seconds. Before training, dynamic movement is the better choice: it raises temperature and rehearses movement patterns, while research shows holding long static stretches right before a session can temporarily reduce muscle power output. Save static stretching for after your workout or a separate mobility session, when reduced power output does not matter and improving long-term flexibility is the goal — see our post-workout stretching routine.

A simple dynamic warm-up routine

Our free 6-minute dynamic warm-up plan runs through a full routine with the 3D coach demonstrating each movement.

Warming up before lifting weights

Beyond general dynamic movement, add specific warm-up sets for your first heavy exercise: a few light-to-moderate reps at roughly 40–60% of your working weight, building up in two or three steps to your actual working weight. For example, before a working set of squats at 80 kg, you might do 5 reps at the empty bar, 5 at 40 kg, and 3 at 60 kg before your first working set. This teaches the movement pattern under increasing load and is one of the best, most reliable ways to avoid a heavy first working set feeling unexpectedly difficult, shaky or unstable.

Warming up for running or HIIT

For running, a dynamic warm-up plus a few minutes of easy jogging that gradually builds to your target pace works better than static stretching cold muscles. For HIIT or interval training, since intensity ramps up quickly, spend slightly longer on the dynamic warm-up (closer to 8–10 minutes) so your cardiovascular system and joints are genuinely ready for near-maximal effort within the first minute of work, rather than being caught off guard by the sudden intensity.

Warm-up for beginners, seniors and kids

Beginners and older adults generally benefit from a slightly longer, gentler ramp-up — the same dynamic movements at a slower pace and smaller range, gradually increasing over the warm-up rather than starting at full range immediately. Warming up matters just as much, if not more, for anyone returning to exercise after time off or managing a joint condition; see our exercise for seniors guide for more tailored advice. Kids generally need less structured warm-up since play-based, varied movement already covers much of the same ground, but a few minutes of light movement and a couple of dynamic stretches before organized sport is still a reasonable, easy habit to build early and carry into adulthood.

Adjusting the warm-up to what you are training

A general dynamic warm-up covers the whole body, but the last minute or two is worth spending on the specific joints and muscles your session focuses on. Before an upper-body session, add extra shoulder circles, band pull-aparts and a couple of light warm-up sets of your first pressing or pulling movement. Before a lower-body session, add extra leg swings, walking lunges and a couple of light warm-up sets of your first squat or hinge movement. This targeted addition takes only another minute or two beyond the general routine but specifically primes the muscles and joints under the most load that day.

The mental side of warming up

A warm-up is also a useful transition period between whatever you were doing before training and the focus a hard session needs. Using the warm-up minutes to mentally rehearse the session — which exercises, roughly what weights, what you want to focus on technically — can improve the quality of the working sets that follow, independent of the physical benefits. This matters especially for beginners still learning new movement patterns, where a calm, unhurried warm-up reduces the rushed feeling that often leads to sloppy first working sets.

Common warm-up mistakes

• Only doing static stretches cold. Holding a hamstring stretch for 30 seconds before any movement at all skips the temperature and blood-flow benefits a dynamic warm-up provides.
• Warming up too intensely. A warm-up that already leaves you breathless or fatigued defeats its purpose — it should feel noticeably easier than your working sets.
• Skipping it when short on time. Cutting the warm-up first when a session is rushed is a common but counterproductive habit; shortening the main workout by a few minutes instead preserves the injury-prevention benefit.
• Using the exact same warm-up regardless of the session. A warm-up before a heavy squat day should look somewhat different from one before an easy recovery walk.

How long should a warm-up be?

Five to ten minutes covers most training sessions comfortably. Cold weather, early-morning sessions, or a history of joint stiffness are all good reasons to lean toward the longer end of that range. Skipping it entirely to save a few minutes is one of the most common — and most easily fixed — mistakes in a beginner's routine; see our gym for beginners guide for how it fits into a full session.

Warming up safely

A warm-up should feel easy and controlled, gradually building intensity — sharp pain during warm-up movements is a sign to stop and modify the exercise, not push through. Anyone with a joint injury, recent surgery, or a chronic condition affecting movement should check with a physiotherapist or doctor about which warm-up movements are appropriate before returning to a full routine.

A consistent five-to-ten-minute dynamic warm-up before every single session is one of the simplest, most evidence-backed habits available for training more comfortably and reducing injury risk over the long run.

Warming up in cold weather

Cold temperatures make muscles and connective tissue stiffer and slower to respond, so training outdoors or in an unheated space in winter is a good reason to extend a warm-up by a couple of minutes and dress in layers you can remove as your body temperature rises. Outdoor runners and sports players in cold weather in particular benefit from a slightly longer, more gradual warm-up jog before any faster or higher-intensity work, since cold air itself does not warm the muscles the way indoor, climate-controlled training does.

Making the warm-up a habit, not an afterthought

The biggest barrier to warming up consistently is usually not knowing what to do — it is treating it as optional when short on time. Building the warm-up into your session as a fixed, non-negotiable first block, the same way you would not skip the main lifts of a workout, keeps it from being the first thing cut when a session feels rushed. Following a set routine like the one above, rather than deciding fresh each day, also removes the friction of figuring out what to do, which makes it far more likely to actually happen every single session.