Percussive therapy devices — massage guns — deliver rapid mechanical pulses into soft tissue. They've gone from niche to ubiquitous in a few years, and the claims made for them have expanded accordingly.
The reality is more modest than the marketing, but not nothing.
What the evidence reasonably supports
- Short-term range of motion improvement. Fairly consistent finding, though the effect is temporary.
- Reduced perception of muscle soreness. Useful in the days after hard training.
- Reduced perceived muscle stiffness immediately after use.
- A viable warm-up adjunct — brief use before activity may improve range without the strength reduction associated with prolonged static stretching.
What isn't well supported
- "Breaking up" scar tissue or adhesions. The forces involved are nowhere near sufficient to remodel dense connective tissue.
- Flushing lactic acid. Lactate clears on its own within about an hour. It isn't what makes you sore days later.
- Meaningfully faster tissue healing.
- Improving actual strength or performance beyond the range-of-motion effect.
- Permanently resolving trigger points. Temporary relief is common; lasting change usually needs the underlying load addressed. More on this: what trigger points actually are.
A fair summary
It's a convenient, reasonably effective tool for short-term symptom relief and warm-up. It is not a treatment for an injury, and it doesn't replace strengthening, loading or hands-on assessment.
How to use one sensibly
- Roughly 30 to 60 seconds per muscle group is plenty — longer isn't better
- Keep it moving rather than parking it on one spot
- Use moderate pressure; it should not be painful
- Muscle bellies only
Where not to use it
- Directly over bone, joints or bony prominences
- Over nerves or major blood vessels — avoid the front of the neck entirely
- On an acute injury, bruise, or area of swelling
- Over a suspected fracture or stress fracture
- Anywhere with numbness or altered sensation
- If you take anticoagulants or have a clotting disorder, ask first
If a muscle feels persistently tight no matter how much you use the device, that tightness is usually protective — something is driving it. That's worth assessing rather than treating harder.