Skip the Warm-Up, Pay the Price
Most runners either skip the warm-up entirely or do it wrong. The skip-it camp heads straight out the door and runs, treating the first kilometre as the warm-up. The do-it-wrong camp sits on the ground touching their toes for 30 seconds, then runs. Both approaches increase injury risk and reduce performance. The research is clear. A PMC study of recreational runners found that both static and dynamic stretching during warm-up significantly improved running economy compared to no stretching (dynamic: p < 0.01, static: p < 0.05) and significantly reduced rating of perceived exertion. Put simply: a proper warm-up makes the same pace feel easier. A separate PMC review confirmed that dynamic warm-ups play a pivotal role in injury prevention, with athletes who incorporate dynamic warm-ups experiencing fewer muscle strains, sprains, and overuse injuries than those who rely solely on static stretching or no warm-up at all. The warm-up works through three mechanisms: (1) it increases core body and muscle temperature, making muscle fibres more elastic and less prone to tearing; (2) it stimulates the nervous system, improving coordination, reaction time, and muscle activation patterns; (3) it gradually increases heart rate and blood flow, allowing the cardiovascular system to meet the demands of running without the shock of an abrupt start. A proper warm-up takes 5-10 minutes. That is less than 10% of a typical run. The return on this time investment, in injury prevention, performance, and enjoyment, is enormous.
The 10-Minute Pre-Run Warm-Up Sequence
Phase 1: Brisk walking (2-3 minutes). Start every run with 2-3 minutes of purposeful walking at a pace slightly faster than your normal walking speed. This elevates heart rate from resting to approximately 50-60% of maximum, begins increasing blood flow to the legs, and allows you to mentally transition into running mode. Do not skip this even if you feel warmed up from daily activity. The walking phase is particularly important for morning runs when your body has been horizontal for hours and muscles are at their coldest and stiffest.
Phase 2: Dynamic stretches (3-5 minutes). Dynamic stretches are controlled movements that take your joints through their full range of motion without holding a position. Unlike static stretches (holding a stretch for 15-60 seconds), dynamic stretches activate muscles rather than relaxing them. Perform each exercise for 30-45 seconds or 10-15 repetitions per side:
Leg swings (forward/backward): Hold a wall or tree for balance. Swing one leg forward and backward like a pendulum, increasing range gradually. 15 swings per leg. This mobilises the hip flexors and hamstrings, the two muscle groups most commonly tight in runners.
Leg swings (lateral): Swing the leg across the body and out to the side. 15 swings per leg. This opens the hip adductors and IT band, reducing lateral tightness.
High knees: March in place, driving each knee to hip height. 20 total repetitions (10 per side). Progress to a light jog with high knees for more activation. This engages hip flexors, core, and quads while elevating heart rate.
Butt kicks: Jog in place, pulling each heel towards your glute. 20 total repetitions. This activates the hamstrings and increases knee range of motion.
Walking lunges: Take a long step forward, lowering the back knee towards the ground, then step through into the next lunge. 8-10 per side. This stretches the hip flexors and activates the glutes and quads in a running-specific pattern.
Hip circles: Stand on one leg, lift the other knee to hip height, then rotate the hip in a circle (5 forward, 5 backward). Repeat on the other side. This mobilises the hip joint through its full range of motion, critical for runners with desk-bound jobs.
Ankle circles: Lift one foot and rotate the ankle 10 times in each direction. Repeat on the other side. This prepares the ankle joint for the repetitive loading of running.
Phase 3: Easy jog (2-3 minutes). Begin running at a very easy pace, significantly slower than your intended training pace. This bridges the gap between dynamic stretches and your main session. Your heart rate rises to 60-70% of maximum, blood flow to the legs reaches running-level volumes, and your neuromuscular system calibrates to the running movement pattern. By the end of this phase, you should feel loose, warm, and ready to increase pace to your planned training effort.
For speed sessions: add strides. Before interval training, tempo runs, or races, add 4-6 strides after the easy jog: 20-second accelerations to near-sprint pace, with 30-40 seconds of walking recovery between each. Strides prime the neuromuscular system for high-speed running, activating fast-twitch fibres that are not engaged during easy jogging. This reduces injury risk during the first fast repetition and improves performance for the entire session.
How to Customise Your Warm-Up
- Easy runs: 5 minutes is sufficient. For easy, conversational-pace runs, a shortened warm-up of 2 minutes walking plus 3 minutes of dynamic stretches is adequate. The run itself starts easy and gradually increases to your intended easy pace, effectively extending the warm-up. You do not need strides or an extended dynamic routine before easy runs. The goal is simply to transition from stillness to movement without abruptness.
- Hard sessions: 10-15 minutes is necessary. Before intervals, tempo runs, hill repeats, or races, invest 10-15 minutes in a full warm-up. The higher the intensity of the upcoming session, the longer and more thorough the warm-up should be. Fast running places significantly greater forces on muscles, tendons, and joints. Attempting sprint-pace efforts on cold, un-activated muscles is one of the most common causes of hamstring and calf strains in runners. The full sequence: 3 minutes walking, 5 minutes dynamic stretches, 3 minutes easy jog, 4-6 strides.
- Cold weather and morning runs: extend the warm-up. Muscles are stiffer in cold conditions and after sleep. In cold weather or for early morning runs, add 2-3 minutes to your normal warm-up time. Consider doing the dynamic stretch portion indoors where it is warmer, then transitioning outside for the jogging phase. Cold muscles are significantly more prone to injury, and the warm-up investment pays even greater dividends in winter. Proper foot support during warm-up and throughout the run helps maintain alignment as muscles transition from cold to working temperature. The Shapes HYROX Edition provides structured support from the first step, helping maintain biomechanical alignment during the critical early phase of a run when muscles are not yet fully activated.
- Save static stretching for after the run. Static stretching (holding a stretch for 15-60 seconds) has its place: after running, when muscles are warm and pliable. Post-run static stretching improves flexibility, reduces next-day stiffness, and supports long-term range of motion. But before running, static stretching relaxes muscles and can temporarily reduce their force-producing capacity. While short-duration static holds (under 60 seconds) appear to have minimal negative impact, dynamic stretching is consistently shown to be more beneficial as a pre-run activity. If your warm-up includes any static stretching, keep holds under 30 seconds and always follow with dynamic movement. Understanding how your warm-up affects your running mechanics can help refine your routine. Arion Running Analysis can compare gait metrics from your first kilometre versus your fifth, revealing how effectively your warm-up prepares your body for efficient running.
FAQ
Should I stretch before running?
Yes, but dynamic stretching, not static. Dynamic stretches (leg swings, high knees, walking lunges, hip circles) activate muscles and improve range of motion before running. A PMC study confirmed that stretching during warm-up improved running economy and reduced perceived exertion compared to no stretching. Static stretching (holding positions for 15+ seconds) is better suited for after running. Short static holds under 30 seconds before running are acceptable but should always be followed by dynamic movement.
How long should a warm-up be before running?
Five minutes for easy runs (walking plus dynamic stretches). Ten to fifteen minutes for hard sessions, races, and speed work (walking, dynamic stretches, easy jog, and strides). In cold weather or for early morning runs, add 2-3 additional minutes. The warm-up should bring you to a state where you feel loose, warm, and your heart rate is elevated above resting. If you start running and still feel stiff after the first kilometre, your warm-up was insufficient.
What is the best warm-up routine before a run?
The evidence-based sequence: (1) 2-3 minutes brisk walking. (2) 3-5 minutes dynamic stretches: leg swings (forward/back and lateral), high knees, butt kicks, walking lunges, hip circles, ankle circles. (3) 2-3 minutes easy jogging. (4) For speed sessions, add 4-6 x 20-second strides with walking recovery. This sequence progressively increases body temperature, muscle elasticity, nervous system activation, and heart rate, preparing the body for running demands.
Is static stretching bad before running?
Not exactly bad, but not optimal. Static stretching relaxes muscles and can temporarily reduce force production capacity. However, research shows that short-duration holds (under 60 seconds) have minimal negative impact on performance. The PMC study found that static stretching still improved running economy compared to no stretching at all. The takeaway: if you prefer some static stretching before running, keep holds brief (under 30 seconds) and always follow with dynamic movement. But if you are choosing between static and dynamic, choose dynamic for pre-run and save static for post-run.
Do I need to warm up before easy runs?
Yes, though a shortened warm-up is sufficient. Even for easy runs, 2-3 minutes of walking plus 2-3 minutes of dynamic stretches transitions your body from rest to running more safely and comfortably. Skipping the warm-up for easy runs is common but suboptimal: the first kilometre feels harder than it needs to, and the abrupt transition from inactivity to running places unnecessary stress on cold muscles and joints. A brief warm-up makes even easy runs feel better from the first step.
