How to Warm Up Properly — A 10-Minute Routine
A warm-up is the most skipped part of training and the most useful: ten minutes that reduce injury risk, improve performance, and make the session feel better. The evidence is clear that warming up properly reduces injury — muscles that are warm are more elastic, joints are better lubricated, and the nervous system is primed to coordinate the movements. Yet most lifters walk into the gym, load the bar, and start lifting cold, because the warm-up feels like wasted time. It is not wasted: it is the part of the session that makes the rest of it work.
The headline answer is that a proper warm-up takes about 10 minutes and has three parts: 5 minutes of light general activity to raise body temperature, 3–5 minutes of dynamic stretches for the muscles you are about to use, and 2–3 warm-up sets of the first exercise at increasing weights. That is the whole routine, and it applies to every session — lifting, running, team sports — with the specific movements changed to match the session.
Use the calculator
Start with your own numbers: try our heart rate zone calculator to work out your figures before applying anything on this page. The worked examples below use round numbers so you can follow the maths; the calculators use your real weight, height, age and goal.
Related reading: How to Cool Down After Exercise, Stretching Guide, Mobility Work for Lifters. You can also browse the full guides section for the rest of the series.
The key points
Raising temperature is the main job. Muscle that is 1–2 °C warmer is more elastic, contracts faster, and is less likely to tear. Five minutes of light activity — a brisk walk, easy cycling, rowing or jumping jacks — raises core temperature enough to make a difference, and it is the part of the warm-up that actually reduces injury risk. The dynamic stretches and warm-up sets that follow are important, but they do not replace the temperature rise.
Dynamic stretches prepare the specific muscles. Leg swings before squats, arm circles before bench press, hip openers before deadlifts — dynamic stretches move the joints through the range they will use in the session, without reducing strength the way static stretching does. Five to ten dynamic movements, 10 reps each, take about 3–5 minutes and leave the body ready for the session. Static stretching belongs after training, not here.
Warm-up sets are the most specific warm-up there is. The best preparation for a heavy squat is a lighter squat: 2–3 sets at increasing weights (empty bar, 50%, 70% of the working weight) groove the movement pattern, warm the specific muscles, and let you check that everything feels right before the heavy work. Skipping warm-up sets and jumping to the working weight is the most common cause of strains in the gym — the muscle is asked for maximal force before it has produced any force at all.
A warm-up improves performance, not just safety. Warmed-up muscles produce more force, react faster and coordinate better than cold ones, so the working sets are stronger after a proper warm-up. The effect is about 5–10% on strength and power, which is the difference between a good session and a mediocre one. The warm-up is not time taken from the session; it is time that makes the session better.
At a glance
| Part | What to do | Duration | Purpose |
|---|---|---|---|
| General | Brisk walk, cycling, rowing | 5 min | Raise temperature 1–2 °C |
| Dynamic | Leg swings, arm circles, lunges | 3–5 min | Prepare the specific muscles |
| Warm-up sets | Empty bar → 50% → 70% | 2–3 min | Groove the movement, check form |
| Total | — | About 10 min | Ready to train |
The formula behind it
The warm-up prescription is about 10 minutes: 5 minutes of general activity, 3–5 minutes of dynamic stretches, and 2–3 warm-up sets. The temperature rise is 1–2 °C in core and muscle temperature, which is enough to improve elasticity and force production by about 5–10% (a consistent finding in warm-up studies). The warm-up sets follow a simple progression: empty bar × 10, 50% of working weight × 5, 70% × 3, then the working sets. Static stretching before training, by contrast, reduces strength by about 5–8% (Kay & Blazevich, 2012) — which is why it belongs after the session, not in the warm-up.
Worked example — a lifter about to squat 100 kg for working sets. Warm-up: 5 minutes of easy cycling, then leg swings (10 per leg), walking lunges (10 per leg) and hip openers (10 per side), about 4 minutes. Warm-up sets: empty bar (20 kg) × 10, 50 kg × 5, 70 kg × 3, then the working sets at 100 kg. Total warm-up time: about 11 minutes. The alternative — walking in and loading 100 kg cold — risks a strain on the first set and produces weaker reps, because the muscles are cold and the movement pattern is not grooved. The 11 minutes are the cheapest insurance in the session.
Your plan, step by step
- Start with 5 minutes of light general activity: a brisk walk, easy cycling or rowing, until you feel warm.
- Do 5–10 dynamic stretches for the muscles you are about to use, 10 reps each, for 3–5 minutes.
- Do 2–3 warm-up sets of the first exercise: empty bar, then 50%, then 70% of the working weight.
- Check that everything feels right on the warm-up sets — if a joint or muscle feels wrong, address it before the heavy work.
- Start the working sets only when you feel warm, loose and coordinated — usually about 10 minutes in.
How to use this guide
Use the same warm-up structure for every session, changing only the dynamic stretches and the warm-up sets to match the day's exercises. Ten minutes is the investment, and it pays back in fewer injuries, stronger working sets and sessions that feel better. If you are short on time, cut the session short — never cut the warm-up. A session without a warm-up is a session with an avoidable injury risk.
Common mistakes
Skipping the warm-up entirely. The most common error in the gym: loading the working weight cold and straining a muscle on the first set. Ten minutes of warm-up prevents the injury that costs weeks of training.
Static stretching in the warm-up. Holding a stretch for 30–60 seconds before training reduces strength by 5–8% in the stretched muscle. Warm up dynamically, and save static stretching for after the session.
Warming up too long or too hard. A warm-up that takes 25 minutes or leaves you tired has become a workout. Ten minutes, light to moderate effort, is enough — the warm-up should leave you ready, not exhausted.
What this guide does NOT tell you
Warm-up guidance on this page is for healthy adults; people with injuries or medical conditions should follow their clinician's or physiotherapist's advice on warming up and on which exercises are safe. Pain during a warm-up is a warning sign — stop and assess it rather than training through it. This guide is general information, not medical advice.
Frequently asked questions
How long should a warm-up be?
About 10 minutes: 5 minutes of light general activity, 3–5 minutes of dynamic stretches, and 2–3 warm-up sets of the first exercise. That is enough to raise muscle temperature by 1–2 °C and prepare the specific muscles. A warm-up that takes 25 minutes or leaves you tired has become a workout — ten minutes is the right dose for most sessions.
What is the best warm-up before lifting?
Three parts: 5 minutes of light activity (walk, cycle, row), 3–5 minutes of dynamic stretches for the muscles you will use (leg swings before squats, arm circles before bench press), and 2–3 warm-up sets at increasing weights (empty bar, 50%, 70% of the working weight). That structure works for every lifting session, with the specific movements changed to match the day.
Should I stretch before a workout?
Dynamically, yes; statically, no. Dynamic stretches (moving through a range of motion) prepare the body without reducing strength. Static stretching (holding a position for 30–60 seconds) before training reduces strength by about 5–8% (Kay & Blazevich, 2012), so save it for after training or for rest days.
Does warming up prevent injury?
Yes — warming up properly reduces injury risk, mainly because warm muscle is more elastic, joints are better lubricated, and the nervous system is primed to coordinate the movements. The temperature rise is the key part: 5 minutes of light activity is what delivers most of the benefit. Warming up does not make injury impossible, but it makes it substantially less likely.
Do I need to warm up for a short workout?
Yes — even more so, because a short workout has less time to build up gradually. A 20-minute session still needs a 10-minute warm-up, or the first working set is done cold. If you are short on time, cut the workout short, not the warm-up — the warm-up is the part that keeps you safe.
Estimates only, not medical advice. Minimum safe intakes: 1,200 kcal/day women, 1,500 kcal/day men — consult a healthcare professional before a very-low-calorie diet.