Red Light / Photobiomodulation Therapy — Exercise & Movement
Application of red (630-670 nm) and near-infrared (810-850 nm) light for mitochondrial function, tissue repair, inflammation reduction, and skin health.
Overview
Photobiomodulation (PBM), formerly known as low-level laser therapy (LLLT), uses specific wavelengths of red (630-670 nm) and near-infrared (810-850 nm) light to stimulate mitochondrial function. The primary mechanism involves photon absorption by cytochrome c oxidase (Complex IV) in the electron transport chain, displacing inhibitory nitric oxide and increasing ATP production. Over 6,000 published studies demonstrate benefits for wound healing, musculoskeletal pain, skin rejuvenation, hair regrowth, cognitive function, and exercise recovery. A 2018 meta-analysis found PBM improved time to exhaustion by 4.5% and reduced post-exercise CK levels (muscle damage marker) by 15%. Dosing (irradiance, wavelength, duration) is critical — the biphasic dose response means too little or too much light is ineffective.
Indications
- Exercise recovery and performance enhancement
- Wound healing and tissue repair
- Skin health and collagen production
- Musculoskeletal pain reduction
- Hair regrowth (androgenetic alopecia)
- Cognitive function (transcranial PBM)
Mechanism of Action
Photons at 630-850 nm are absorbed by cytochrome c oxidase (Complex IV), displacing inhibitory nitric oxide and increasing electron transport chain throughput
Dosing
| Compound | Dose | Frequency | Notes |
|---|---|---|---|
| Red Light (630-670 nm) | 10-20 min per treatment area | 3-5x/week | Irradiance 30-100 mW/cm²; dose 3-50 J/cm² depending on target |
| Near-Infrared (810-850 nm) | 10-20 min per treatment area | 3-5x/week | Deeper tissue penetration (4-5 cm); same irradiance range |
Safety & Contraindications
- Eye protection required for near-infrared devices — retinal damage possible
- Avoid use over active cancers or malignant lesions (theoretical concern of growth stimulation)
- Some medications increase photosensitivity (tetracyclines, retinoids)
- No evidence of harm at therapeutic doses, but biphasic response means more is not better
- Heat generation at high irradiances — maintain comfortable skin temperature