The Heartwood Review / Red light therapy
Peer-reviewed studies on photobiomodulation with red and near-infrared light: skin, muscle recovery, pain, wound healing, and the limits of the evidence. 10 entries, newest first. Every entry links to its source.
This well-designed meta-analysis of 586 participants across 37 trials suggests red light therapy's performance benefits are narrow and exercise-mode specific, not a broad ergogenic tool.
Sports medicine (Auckland, N.Z.), 2022 · Dutra et al.
Modest meta-analysis of 16 trials and 340 participants; wide variation in device parameters across studies limits confidence in the fatigue finding.
Lasers in medical science, 2023 · Bezerra et al.
This meta-analysis of 34 RCTs suggests small-to-moderate benefits for athletes and sedentary individuals, but the effect sizes are modest and the finding of no benefit in moderately active people introduces an important caveat.
Lasers in medical science, 2024 · Li et al.
Results are promising but should be interpreted cautiously given the small, single-condition trial design and the fact that most outcomes, including pelvic floor muscle pressure, did not differ significantly across the three groups.
Climacteric : the journal of the International Menopause Society, 2026 · Oliveira Bezerra L et al.
Promising but preliminary: only five trials and 240 participants met inclusion criteria, leaving the overall conclusion far from settled.
Lasers in medical science, 2026 · Vital de Azevedo et al.
Encouraging early signals, but this review rests on just four trials totaling 133 participants, making it far too limited to draw definitive conclusions about PBMT's role in post-surgical recovery.
Photobiomodulation, photomedicine, and laser surgery, 2026 · Eladl et al.
This is a narrative review rather than a clinical trial, so it maps the gap between existing evidence and marketing language rather than generating new outcome data.
Journal of drugs in dermatology : JDD, 2026 · Barton et al.
Modest, exploratory findings from 23 RCTs suggest a small benefit for muscle performance, but subgroup results were largely nonsignificant and the authors say optimal protocols remain undefined.
Journal of integrative and complementary medicine, 2026 · Zhai H et al.
This meta-analysis of 11 RCTs (n = 456) found no clear strength benefit, though the subset eligible for pooled analysis was modest at 146 participants across five trials.
Photobiomodulation, photomedicine, and laser surgery, 2026 · Chen et al.
A well-controlled trial of 52 adults found that near-infrared laser therapy was largely indistinguishable from placebo for trapezius pain relief, limiting enthusiasm for this specific application.
Lasers in medical science, 2026 · Silva et al.