An interventional study of Whole-body Photobiomodulation Therapy in Photobiomodulation Therapy and Phototype, sponsored by Universidade Federal de Sao Carlos. Recruiting at 1 site in Brazil. Open to participants aged 18 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-03-12.
Sponsored by Universidade Federal de Sao Carlos · Not applicable, Interventional, and Health services research
Photobiomodulation therapy (PBMT) is based on exposing biological tissues to low-intensity light, with effects depending on the light-tissue interaction. When irradiated without skin contact, part of the incident light is reflected and lost. In this context, the amount of reflected light in PBMT applied without skin contact, as well as the influence of skin phototype, has not yet been established. Objective: To quantify the reflection of light from PBMT on the skin of men and women aged 18 to 30 years, considering skin phototypes. Methodology: Participants will be divided into three groups based on skin phototype (Group 1: phototypes I and II; Group 2: phototypes III and IV; Group 3: phototypes V and VI) and sex. They will be subjected to whole-body PBMT with red light (660 nm; 31.85±3.85 mW; 45.50±5.07 mW/cm²) and infrared light (850 nm; 25.29±2.99 mW; 36.13±4.27 mW/cm²) at 20 cm from the light-emitting source, with measurement of light reflection in the regions of the brachial biceps, abdomen, lumbar, anterior and posterior thigh, and calf using a power and energy analyzer (powermeter PM100D and sensor S130C, 0.7 cm²). Data will be analyzed for normality and groups were compared with a significance level of 5%
Universidade Federal de Sao Carlos is the lead sponsor of 85 studies on the registry; 8 are open to participants now.
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Exclusion Criteria:
This group received measures of the light reflection using a whole-body photobiomodulation therapy with a Joovv device. In this group, participants were subclassified with the Fitzpatrick scale for their phototypes.
Device: Whole-body Photobiomodulation Therapy
Whole-body Photobiomodulation Therapy applied for approximately 10 minutes, being 5 minutes with the red wavelength and 5 minutes with the infrared wavelength.
Light Reflection
Light reflection will be measured in mW with a PowerMeter Device in the angles of 30º, 60º and 90º considering the participant in front of the whole-body photobiomodulation therapy device.
Time frame: Acute measurement. The measurement will be performed just during the light therapy irradiation, on the day of the procedure.
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Universidade Federal de Sao Carlos