The Paradox of Power: Why Running Relaxed Makes You Faster

Watch the front pack of the Olympic 1500m final blazing down the track toward the finish line, all hoping to capture the illustrious Gold Medal, and you'll notice something counterintuitive: they look loose, almost effortless, even as they maintain a blistering pace. Meanwhile, many recreational runners tense up, their shoulders climbing toward their ears, jaws clenched, fists balled tight—working harder but moving slower.

This isn't just about "looking good." Running relaxed is a fundamental performance principle backed by biomechanics, physiology, neuromuscular science, and psychology. Let's explore why loosening up might be the key to unlocking your fastest running.

The Biomechanical Case: Every Wasted Motion Costs You

When you run, you're essentially a series of springs and levers converting stored elastic energy into forward motion. Tension in the wrong places disrupts this elegant system.

The efficiency equation is simple: Your body has a fixed amount of energy to spend. Every bit of tension that doesn't contribute to propelling you forward is energy stolen from your performance. When you clench your jaw, raise your shoulders, or grip your fists, you're activating muscles that do nothing to move you down the road. That's energy burned with zero return on investment.

Research on running economy—how much oxygen you consume at a given pace—shows that excessive tension increases your metabolic cost. You're essentially carrying unnecessary muscular work, like running with a backpack full of rocks you don't need. Studies have shown that running economy is a critical determinant of distance running performance, with better economy allowing runners to maintain faster paces at lower oxygen costs.

When I was a freshman in high school, an older athlete would tell me, “fish lips and potato chips” – as in, relax your face so it jiggles like fish lips and relax your hands so you can hold a potato chip without it breaking.

Consider your arm swing: Relaxed hands and arms act as counterbalances to your leg drive, maintaining rotational stability with the least amount of effort. Tense, rigid arms require constant muscular work to maintain their position, creating a multitude of tensions throughout your torso and hips. The result? You work harder to maintain the same pace.

The Physiological Reality: Tension Disrupts Your Engine

Your cardiovascular system during distance running is performing an intricate dance of oxygen delivery and waste removal. Muscle tension throws off this rhythm in several ways.

Blood flow and oxygen delivery: Chronically tensed muscles compress blood vessels, restricting the flow of oxygen-rich blood to working tissues. During exercise, skeletal muscle blood flow can increase 20 to 50-fold from rest to maximal exertion, with contracting muscles receiving over 80% of cardiac output during strenuous effort. This massive increase in blood flow is crucial for oxygen delivery—but muscle tension can impair this process. Studies examining muscle blood flow during exercise have demonstrated that excessive muscle tension potentially compromises optimal blood flow.

Lactate clearance: During sustained efforts, your body produces lactate as a metabolic byproduct. Your ability to clear and recycle this lactate depends on good circulation. Unnecessary muscle tension, particularly in large muscle groups, can impair this clearance, causing you to accumulate fatigue faster than necessary.

Breathing mechanics: Perhaps most critically, tension in your neck, shoulders, and torso directly restricts your breathing. Your diaphragm and intercostal muscles need freedom to expand your ribcage fully. Shoulder tension pulls your ribcage into a less optimal position, while jaw and neck tension often correlates with restricted breathing patterns. The result? You work harder to breathe, using accessory breathing muscles that fatigue quickly, while getting less oxygen per breath.

Studies measuring respiratory efficiency show that runners who maintain relaxed upper bodies can sustain lower breathing rates at the same intensity, indicating more efficient oxygen exchange.

The Neuromuscular Perspective: Your Nervous System's Balancing Act

Distance running requires precise coordination between thousands of motor units—groups of muscle fibers controlled by individual nerve cells. Relaxed running optimizes this coordination.

The co-contraction problem: When you're tense, you often simultaneously contract opposing muscle groups (agonists and antagonists). For example, if you tense your hip flexors while also engaging your glutes, these opposing forces fight each other. This co-contraction doesn't just waste energy; it actually slows you down and increases injury risk by creating excessive joint compression.

Relaxed running allows for more efficient reciprocal inhibition, where one muscle group releases as its opposite contracts—the natural pattern your nervous system prefers.

Imagine doing a bicep curl. In this action your bicep is contracting to move a weight closer to your shoulder. As it contracts, your triceps (opposing muscle in this case) relax to allow your bicep to maximize its work capacity. Now imagine both your bicep and triceps contracting simultaneously. This will make it much harder to complete the required task.

Motor unit recruitment efficiency: Your nervous system can recruit muscle fibers in different patterns. Smooth, relaxed movements allow for optimal motor unit recruitment, engaging just the right amount of force at the right time. Tension creates noise in the system, often recruiting more motor units than necessary and fatiguing them prematurely.

Elite runners demonstrate exceptional economy of motor unit recruitment. They're not using less muscle; they're using muscle more precisely.

An exercise that I do with my athletes is asking them to maximally tense every muscle in their arms. While tensed, move the arms in a running motion as fast as possible as if you’re in a final kick to the finish line. Now, relax the muscles and repeat the same exercise. Did you move quicker while tensed or relaxed?

Proprioception and ground contact: Relaxation improves your proprioceptive feedback—your body's ability to sense position and movement. Tense muscles have decreased sensory efficiency, which means your nervous system gets fuzzier information about ground contact, body position, and movement patterns. Relaxed running allows for quicker ground contact times and better force application because your nervous system can respond more precisely to sensory input.

The Psychological Dimension: Your Mind Shapes Your Body

The relationship between mental state and physical tension is a two-way street -  and powerful! Your thoughts influence your muscular tension, and your muscular tension influences your thoughts.

Perceived effort: Research on rating of perceived exertion (RPE) consistently shows that runners who maintain relaxed form report lower effort at identical physiological intensities. This isn't just psychological trickery—it reflects real differences in metabolic demand. But the perception itself matters: lower perceived effort allows you to sustain pace longer and recover more quickly between hard efforts.

The tension-anxiety feedback loop: Mental stress creates physical tension, which your brain interprets as a signal that you're working harder, which increases anxiety about sustaining your pace, which creates more tension. Breaking this loop by consciously relaxing creates a positive spiral: physical relaxation signals to your brain that you're in control, reducing anxiety and allowing you to settle into your rhythm.

Pain and discomfort management: Distance running inevitably involves discomfort. How you respond to that discomfort determines performance. Tension is often a reaction to discomfort—an attempt to fight or brace against it. Paradoxically, this makes everything worse. Relaxation is a form of acceptance that allows you to coexist with discomfort rather than amplifying it through resistance.

Elite athletes often describe entering flow states where effort feels manageable even at extreme intensities. Physical relaxation is both a cause and consequence of this mental state.

In his book, Sub 4:00, previous American record holder in the mile – and current high school American record holder in the mile, talks about having a breakthrough in performance when he stopped trying to fight the lactic acid buildup in his legs. When he learned to relax through the pain, instead of push through it, he was free to run his fastest times.

Attentional focus: Tension narrows your attention, creating a stressed, threat-focused mindset. Relaxation broadens attention, allowing you to maintain awareness of pace, form, and strategy rather than fixating on discomfort. This broader attentional field is associated with better pacing and decision-making during races.

Practical Integration: Running Relaxed in Practice

Understanding the science is one thing; implementing it is another. Here's how these principles translate to your running:

The body scan technique: During easy runs, periodically scan from head to toe. Start with your jaw—is it clenched? Drop it slightly, let your teeth separate. Move to your shoulders—are they up by your ears? Let them drop. Check your hands—are you making fists? Shake them out and run with loose, lightly curled fingers. This scan takes seconds but resets your system.

Breathe through tension: When you notice tension, focus on your exhale. A full, relaxed exhale triggers your parasympathetic nervous system, promoting relaxation throughout your body. Many runners focus only on the inhale, but the exhale is where relaxation happens.

Use effort, not force: There's a crucial distinction between effort (necessary muscular work) and force (unnecessary tension). You need effort to run fast. You don't need force. Think of applying pressure smoothly rather than gripping tightly. Your foot strike should be spring-loaded, not pounded. Your arm swing should be pendulum-like, not forced.

Start every run relaxed: The first mile sets the tone. If you start tense, trying to hit pace immediately, you're establishing a tense pattern that becomes harder to break as fatigue sets in. Start every run—even workouts and races—with conscious relaxation. Let your pace build from a relaxed foundation rather than chasing pace from a tense one.

Smile and relax your face: Research has shown that even a slight smile during hard efforts can reduce perceived exertion and improve performance. Your facial expression influences your entire body's tension patterns. A relaxed face promotes a relaxed body.

Visualization and cue words: Develop a personal cue that triggers relaxation. Some runners use words like "smooth," "float," or "loose." Others visualize running downhill or imagine they're being pulled forward by a string. Find what works for you and practice it until it becomes automatic.

The Competitive Edge

Here's what makes this principle so powerful: relaxed running is a skill that improves with practice and continues paying dividends as you get fitter. Two runners with identical VO2 max and lactate threshold can have dramatically different race performances based on running economy. Relaxation is one of the most trainable components of economy.

The fastest runners aren't necessarily the ones working hardest—they're the ones working smartest, channeling every available resource into forward propulsion while letting everything else stay quiet. They've learned what every distance runner must eventually discover: you don't muscle your way through distance running. You relax your way through it.

The next time you're pushing through a hard effort, remember this: the tension you're holding isn't helping you. It's costing you. Let it go, and watch what happens when you stop fighting yourself and start running free.

References

Harms, C. A., Wetter, T. J., & St. Croix, C. M. (2000). Effects of respiratory muscle work on cardiac output and leg blood flow during maximal exercise. Journal of Applied Physiology, 89(1), 131–138.

Magness, S. (2014). The science of running: How to find your limit and train to maximize your performance. On Target Publications.

Moore, I. S. (2016). Is there an economical running technique? A review of modifiable biomechanical factors affecting running economy. Sports Medicine, 46(6), 793–807.

Noakes, T. (2012). The lore of running (4th ed.). Human Kinetics.

Paul, O., & Polman, R. (2012). The influence of smiling and frowning facial expressions on peripherally assessed physiological responses during stress. International Journal of Psychology, 47(2), 142–150.

Toussaint L, Nguyen QA, Roettger C, Dixon K, Offenbächer M, Kohls N, Hirsch J, Sirois F. Effectiveness of Progressive Muscle Relaxation, Deep Breathing, and Guided Imagery in Promoting Psychological and Physiological States of Relaxation. Evid Based Complement Alternat Med. 2021 Jul 2;2021:5924040. doi: 10.1155/2021/5924040. PMID: 34306146; PMCID: PMC8272667.