Boosting well-being, health and performance during dark winter months
- Jana Drnkova
- Feb 24, 2025
- 3 min read
Updated: 18 hours ago
As winter sets in and daylight hours dwindle, many people experience disruptions in their circadian rhythm. The lack of natural sunlight can lead to fatigue, mood disturbances, and even seasonal affective disorder (SAD). One emerging solution to this challenge is photobiomodulation (PBM), or red light therapy, which has shown promise in supporting and stabilizing circadian rhythms during the darker months of the year.

Understanding Circadian Rhythm and Its Importance
Our circadian rhythm is a natural 24-hour cycle that influences sleep, hormone production, metabolism, and overall daily function. Exposure to natural light is a key factor in keeping this internal clock aligned. During winter, shorter days and increased artificial lighting can disrupt this rhythm, potentially affecting energy levels, mood, and sleep quality.
How Red Light Therapy Supports Circadian Health
Photobiomodulation (PBM), commonly known as red light therapy, uses specific wavelengths of red and near-infrared (NIR) light to support cellular energy and overall well-being. Using red light strategically can help maintain a balanced circadian rhythm in several ways:
Encouraging Natural Sleep CuesEvening exposure to red light signals the body that it’s time to wind down, supporting natural melatonin rhythms. Unlike blue light from screens, red and NIR light do not suppress melatonin, making them ideal for evening routines.
Boosting Cellular EnergyPBM stimulates mitochondrial function, enhancing ATP production—the energy cells need to operate efficiently. This energy support can help the body adapt to shorter daylight hours, promoting alertness during the day and restful sleep at night.
Supporting Mood and FocusRed light may help the body maintain balanced energy and focus during the darker months, potentially countering winter sluggishness and supporting cognitive clarity.
Enhancing Recovery and PerformanceFor active individuals, PBM can support muscle recovery, circulation, and endurance, making it easier to maintain consistent performance and activity even during winter.
Tips for Using Red Light Therapy in Winter
Morning and Evening Exposure: Morning sessions help signal wakefulness, while evening use prepares the body for rest.
Combine with Sunlight: When possible, spend time outdoors during daylight to reinforce natural circadian cues.
Limit Blue Light at Night: Reduce screen time before bed to let your natural rhythms function smoothly.
Consistency Matters: Regular use of red light therapy helps support energy, focus, and overall daily performance.
Conclusion
Winter’s reduced natural light can make maintaining energy, mood, and sleep more challenging. By incorporating red light therapy into your routine, you can support your natural circadian rhythm, enhance daily alertness, and stay energized throughout the season. PBM provides a simple, non-invasive way to complement your lifestyle, helping you thrive during the darker months.
Sources:
Harvard Health – Light therapy: Not just for seasonal depression?: Harvard HealthLink: https://www.health.harvard.edu/blog/light-therapy-not-just-for-seasonal-depression-202210282840
Mayo Clinic – Seasonal affective disorder treatment: Choosing a light box: Mayo ClinicLink: https://www.mayoclinic.org/diseases-conditions/seasonal-affective-disorder/in-depth/seasonal-affective-disorder-treatment/art-20048298
Frontiers in Neuroscience – The effect of photobiomodulation on the brain during wakefulness: Frontiers in NeuroscienceLink: https://www.frontiersin.org/articles/10.3389/fnins.2022.942536/full
PMC – Improvement in Depression Scores After 1 Hour of Light Therapy: PubMed Central (PMC)Link: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5336550/
Healthline – Red Light Therapy Benefits: HealthlineLink: https://www.healthline.com/health-news/red-light-therapy-benefits
Carbon World Health – Red Light Therapy Can Help Your Seasonal Affective Disorder: Carbon World HealthLink: https://www.carbonworldhealth.com/blog/red-light-therapy-can-help-your-seasonal-affective-disorder
London Cryo – Red Light is Essential (especially in the winter) – and here's why: London CryoLink: https://www.londoncryo.com/blog/2021/11/19/red-light-is-essential-especially-in-the-winter-and-here-s-why
Cleveland Clinic – How Light Therapy Can Help With Seasonal Affective Disorder (SAD): Cleveland ClinicLink: https://health.clevelandclinic.org/light-therapy
PubMed – Treatment of seasonal affective disorder with green light and red light: PubMedLink: https://pubmed.ncbi.nlm.nih.gov/2006698/
Wikipedia – Photoentrainment (chronobiology): WikipediaLink: https://en.wikipedia.org/wiki/Photoentrainment_%28chronobiology%29
Wikipedia – Norman E. Rosenthal, WikipediaLink: https://en.wikipedia.org/wiki/Norman_E._Rosenthal




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