Dynamic stretching should be performed before a workout to activate the muscles and prepare the body for movement, while static stretching should be done far from the effort (and not immediately after) to improve flexibility and promote relaxation.
- Dynamic Stretching: This is done before your workout. It consists of controlled movements (leg swings, circles) that activate the muscles, increase body temperature, and improve joint mobility without reducing strength. It is the ideal warm-up.
- Static Stretching: This is done long after your workout (hours later, or on dedicated days). It consists of holding a stretch position for 20-30 seconds. It serves to increase long-term flexibility and relax the nervous system.
- Common Mistake: Doing static stretching before running can reduce performance and increase the risk of injury because it “puts the muscle to sleep” instead of activating it.
- Immediately after an intense workout? Even in this case, static stretching should be avoided. Working on muscle fibers that are “damaged” from the effort can slow down recovery. It’s better to opt for a light cool-down.
Is Stretching Before a Run Wrong? It Depends on Which Stretch You Do
Stretching is like the introduction to a book: everyone knows it’s important, but it’s often rushed because we want to get to the fun part right away. It’s an almost automatic gesture for anyone who plays sports: before starting, you stop, grab an ankle, and pull your quad for 30 seconds. It’s a ritual we learned as children and have never questioned.
What if I told you that this ritual, performed at that moment, is not only useless but potentially harmful?
The confusion arises because we use the word “stretching” to describe two completely different practices with opposite purposes. Understanding the difference between dynamic and static stretching is the key to stopping your *random training* and starting to use your body in a smarter and safer way.
Dynamic Stretching: Your Body’s Ignition Key (to be done before)
Think of dynamic stretching as the key you put in your car’s ignition. Its purpose is to start the engine and prepare it for movement. It doesn’t involve holding positions, but rather performing controlled, repeated movements that gradually take your joints and muscles through their full range of motion.
How it works: It increases blood flow to the muscles, raises their temperature, and “wakes up” the nervous system, signaling that an effort is about to begin. It’s a form of activation that improves mobility and elasticity without inhibiting the muscle’s ability to contract quickly—that is, to express force.
Practical Examples (to be done after a short warm-up jog):
- Front Leg Swings: Standing, leaning against a wall. Swing one leg forward and backward in a controlled manner, like a pendulum, for 10-12 reps per side.
- Side Leg Swings: Facing the wall, swing your leg out to the side, crossing it in front of your supporting leg, for 10-12 reps per side.
- Hip Circles: Standing, bring one knee to your chest and draw large circles outward, opening the hip. 8-10 reps per leg.
Static Stretching: The Reset for Your Flexibility (to be done long after training)
If dynamic stretching is the ignition, static stretching is the maintenance to be done on a cold engine. It consists of reaching a stretching position and holding it for a prolonged period (typically 20-30 seconds), breathing deeply.
How it works: When you hold a muscle in a stretched position, the nervous system sends a relaxation signal to protect it from overstretching. This is useful for increasing long-term flexibility and calming the nervous system, but it’s the exact opposite of what you want before an effort, when you need reactive muscles ready to contract. Doing static stretching before running is like taking a sleeping pill before a race.
And right after a workout? Contrary to popular belief, performing intense static stretching on a muscle that has just been stressed and is full of micro-tears is not a good idea, as it can interfere with the repair processes and lengthen recovery times. The best time for static stretching is several hours after the effort, or on dedicated recovery days.
Practical Examples (to be done in the evening, or on rest days):
- Quad Stretch: Standing, grab your ankle and bring your heel toward your glute, keeping your knees together and your pelvis in line. Hold for 30 seconds per side.
- Piriformis Stretch: Sitting or lying down, cross one ankle over the opposite knee and gently pull the leg toward your chest until you feel a stretch in the glute muscle. Hold for 30 seconds per side.
The Golden Rule in a Nutshell: Dynamic Before, Static After (but not right away)
If you take away just one concept, let it be this:
- BEFORE you train (after a light warm-up): DYNAMIC stretching to activate and prepare.
- LONG AFTER you train (hours later or on off days): STATIC stretching to improve flexibility and relax.
Stop stretching your muscles randomly. Start using stretching as the intelligent tool it is. Your body, performing better and with fewer injuries, will thank you.