07/30/2026
Why "slack" works better than "stretch" (and how to explain it to patients)
Clinicians hear it all the time: "I’m stretching every day, but my back/hip/shoulder still feels tight."
Our default reflex is often to prescribe more stretching. But if a patient is already stretching consistently without lasting results, doing more of the same isn't the answer.
Fighting the Guardian
Here’s the catch: when tightness or stiffness is accompanied by pain, it’s usually an issue of increased tone and protective guarding—not short tissues.
Yanking into that end-range can trigger an alarm in the Central Nervous System (CNS). The nervous system perceives the stretch as unsafe, driving tone right back up the moment they stand up. You might get a temporary window of mobility, but you haven't changed the system's threat perception.
Instead of fighting the tension, try going the other direction: a novel, shortening, or slack-based strategy.
The Finger Trap Analogy
Here’s how I explain this to patients when they wonder why "slack" works better than stretching:
Think of a finger trap.
What happens when you put your index fingers (the 2nd digits) in and pull both ends apart as hard as you can? The harder you pull, the tighter the mesh constricts.
The only way to release the tension and get your fingers out isn't to pull harder—it’s to push the ends together first to create slack.
When you find the right directional preference—one that unloads or shortens the area—you take the tension off the system. The nervous system relaxes its guard, pain drops, and mobility returns naturally.
Mobility is a Habit (and Movement is the Dosage)
Finding the right movement strategy is only half the battle. To keep the new range, you have to load it.
Mobility behaves like a habit. Once you identify the directional preference that improves pain and range, prescribe it like a medication:
Repetition is the dosage.
Frequency matters. Micro-dosing movement throughout the day keeps the CNS feeling safe in that new range.
Without the right dosage, the desired neuromuscular effect simply won't stick.
Stop forcing stretches into guarded tissue. Find the slack, load the pattern, and dose it repeatedly throughout the day.
What’s your go-to entry point when stretching fails to clear protective guarding? Let’s discuss below.