🧑 Human 🎲 Randomized trial 👥 45 participants ⌛ 4 weeks · 2017 · Brazil (Araranguá)
Effect of Low-Level Laser Therapy and Strength Training Protocol on Hand Grip by Dynamometry.
Barbosa · J Lasers Med Sci · 2017
The protocol this study used
What the authors concluded
In conclusion, LLLT (904 nm) applied before resistance training was effective in gaining grip strength when compared to LLLT (660 nm) and isolated strength training after 4 weeks.
Devices that emit this wavelength
Matched on wavelength within 15nm, since LED bins vary by roughly that much and a tighter match would be false precision. Where we have an irradiance figure, the session length is the time needed to reach this study's dose of 20 J/cm² at that intensity.
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Matching a wavelength is not the same as reproducing a trial. Session times assume the device's published irradiance is accurate at the distance it was measured, which on brand-claim figures is often optimistic. Where a device publishes both a peak and an average we use the average, and where it publishes a falloff curve we use the lowest figure, so these times run long rather than short. Clinical protocols also control for spot size, contact and skin type in ways a home device cannot.
Source
Dosimetry extracted by Vladimir Heiskanen in Photobiomodulation (PBM) research - a comprehensive database. Citation resolved against PubMed.