What a Massage Gun Can't Feel

There is a massage gun sitting on the treatment table at Motive right now. It gets used. Clients ask for it, coaches reach for it between sets, and it does something, which is more than you can say for a lot of recovery gear that ends up in a corner collecting dust. It clearly does something. The real question is what it is actually changing, how long that change lasts, and where it stops being enough.

What the device is changing

A percussion gun delivers rapid, repeated strikes into a muscle at a set frequency, usually somewhere between 20 and 50 hertz depending on the setting. The pattern does not change based on what it finds. It cannot. It has no way to know if the tissue underneath is guarded, inflamed, restricted at a joint above or below, or perfectly fine and just sore from Tuesday’s squats.

A 2023 study using a Theragun Pro on the hamstrings found a real effect after two minutes of treatment: range of motion went up 11.4 percent, and tissue stiffness dropped about 6 percent (1). That is not nothing. But the same study found no change in tissue elasticity, meaning the muscle itself was not lengthening or becoming more pliable at a structural level. What moved was tone and how the tissue was reading on a stiffness sensor immediately afterward, which points to a nervous system effect more than a tissue one. That distinction matters, because it tells you how long the change is going to last and what it is actually doing while it lasts.

A separate trial compared a percussion device directly against static stretching for hamstring extensibility and found no significant difference between the two (2). Same category of result, delivered by two completely different tools. If a $400 device produces the same acute change as thirty seconds of holding a stretch, the two belong in the same bucket, and the stretching bucket has a well documented ceiling of its own. The gun just gets there faster and with better marketing.

The one place a percussion device has shown up in an actual clinical protocol, not just a warm-up routine, is a 2024 trial on patients with cervical disc herniation. Researchers added vibration therapy through a percussion gun on top of standard physical therapy, heat, TENS, and supervised range of motion work, and compared it against the standard therapy alone (3). The vibration group came out ahead on pain during activity. But the standard therapy group actually did better on one measure of joint position sense, the body’s ability to know where a joint is in space without looking at it. Even in the setting where the device performed best, it was riding along inside a program built and adjusted by a clinician, not running the whole show, and it still lost on part of the scorecard. That is a fair description of where a percussion gun belongs. An add-on, inside a program someone is actively managing, not a standalone fix.

None of that makes the gun useless. A short-term drop in tone before a session, a quick change in how a tight spot feels before you load it, a warm-up tool with a fast setup time, all real uses. It sits in roughly the same category as foam rolling, a legitimate pre-session tool that gets asked to do a job it was never built for. What the gun is not doing is finding anything, deciding anything, or changing based on what it encounters. It runs the same pattern on a hip flexor that is guarded from three years of desk sitting as it does on a calf that is just tired from a long run.

What hands are actually doing, and what they are not

It would be easy to write the next part of this as hands good, machine bad, and call it a day. That is not honest, and it is not what the research on manual work actually says. A pair of hands pressing into a muscle for ten minutes is not lengthening that muscle either. Between the skin and the fascia underneath it sits a frictionless layer that lets the skin slide over what is beneath it, which is why you can rub your forearm without dragging the muscle around with it. Force applied at an angle across that surface mostly dissipates before it reaches anything structural. You cannot shear a hamstring into a new resting length with your hands any more than a percussion gun can, and claiming otherwise is the same overreach in a different package.

What manual work does appear to do is real, just smaller and different than the marketing usually says. A small 2012 study in Science Translational Medicine took muscle biopsies from a group of men after exercise-induced muscle damage, massaging one leg and leaving the other as a control. The massaged leg showed lower levels of inflammatory markers, activated cellular repair signaling, and reduced the stress response inside the muscle fiber (4). Eleven participants, one study, and it deserves the same caution any single study deserves. But it is a real, measured, cellular-level signal, not a feeling someone reported afterward. That kind of finding does not show up from a fixed vibration pattern, because the tissue effect appears to depend on the specific pressure, direction, and duration a hand applies, adjusted in real time to what it finds. A device running the same pattern for everyone cannot replicate variables it has no way to sense.

The part that actually separates the two

Hands read tissue before they decide what to do with it. That is the real difference, and it has nothing to do with which tool feels better in the moment. A trained set of hands moving across a muscle can tell guarding from actual restriction, a spot that needs pressure held still from one that needs the joint moved through range under load, tissue that responds from tissue that is protecting something upstream. Within a session, a practitioner is watching for softening, a change in temperature under the hand, and spontaneous movement or relaxation in the area being worked, and adjusting pressure and technique based on what shows up. None of that is a frequency setting. It is a judgment call made and remade every few seconds, and it requires feedback the device does not have.

That feedback loop is also where the safety margin lives. A 2021 case report in Physical Therapy documented a young woman who developed rhabdomyolysis, a serious breakdown of muscle tissue, after her coach used a percussion gun on her thighs for what was meant to be simple recovery work (5). She had undiagnosed anemia at the time, which nobody involved was checking for, because there was nothing in the process built to check for it. A fixed pattern applied without a read on what is underneath does not know when to back off. Hands, applied by someone who knows what they are feeling for and paying attention to how the tissue is responding, do.

Motive is building a manual therapy service on exactly this premise, and it is worth being direct about what that means and does not mean yet. It means hands-on work that reads tissue and adjusts session to session, rather than a fixed protocol run on a timer. It is designed to reduce tissue tension where it actually lives instead of wherever a device happened to land, and to work inside the same assessment-first approach that already shapes every program at Motive. The fuller breakdown of what that work is and is not is here, including the honest limits of hands-on treatment on its own.

The device stays on the table. It is not the problem. The problem is treating it like it is doing the job that only a trained hand, paying attention to what it finds and changing course because of it, can actually do.

References

Written by

Brian Murray, FRA, FRSC

Founder of Motive Training

We’ll teach you how to move with purpose so you can lead a healthy, strong, and pain-free life. Our headquarters are in Austin, TX, but you can work with us online by signing up for KINSTRETCH Online or digging deep into one of our Motive Mobility Blueprints.