🧑 Human 🎲 Randomized trial, double-blind, crossover 👥 11 participants ⌛ two sessions with 72h interval (1 active, 1 sham) · 2019 · Brazil (São Paulo)
Acute Effects Using Light-Emitting Diode Therapy (LEDT) for Muscle Function during Isometric Exercise in Asthma Patients: A Pilot Study.
Costa · Biomed Res Int · 2019
The protocol this study used
What the authors concluded
There were no statistically significant differences between groups at the time of contraction (before 41±14 versus 44±16; after 46±12 versus 45±20 s) during the isometric contraction test and inflammatory markers before and after a single LEDT application. A single application of LEDT in the parameters and dose according to the equipment used in the study were not able to promote differences in
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 3.75 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.