170: How Does Light Affect Your HRV?

170: How Does Light Affect Your HRV?

In this episode, I explore the connection between your light environment, the vagus nerve, and heart rate variability (HRV). Drawing on a 2025 systematic review of 25 studies, I explain how both the timing and quality of light exposure can influence nervous system function and overall recovery.

I discuss how morning exposure to bright, blue-enriched light helps regulate your circadian rhythm and support healthy biological rhythms, even if it may cause a temporary reduction in HRV. In contrast, warmer, dimmer light in the evening can help promote relaxation and prepare the body for restful sleep.

I also share practical strategies for optimizing your daily light exposure, particularly for individuals who experience anxiety, stress, or heightened sensitivity to environmental factors.

As a simple challenge, I invite you to pay closer attention to your light habits for one week. Aim to get natural light in the morning and use warmer, lower-intensity lighting in the evening. Observe how your HRV responds over time, rather than focusing on moment-to-moment changes.

If you find this episode valuable, share it with someone who may benefit from it. Small changes in daily habits can have a meaningful impact on long-term health and well-being.

Dr. Navaz Habib

Email: podcast@healthupgraded.com
Facebook: https://www.facebook.com/DrNavazHabib/
Instagram: https://www.instagram.com/drnavazhabib/
LinkedIn: https://ca.linkedin.com/in/drnavazhabib

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185: The Metabolic Upgrade f. Coach Debbie Potts

185: The Metabolic Upgrade f. Coach Debbie Potts

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184: How to Regulate Blood Sugar

184: How to Regulate Blood Sugar

In this episode of the Health Upgrade Podcast, I dive into the growing epidemic of blood sugar dysregulation and type 2 diabetes, breaking down why these issues have become so prevalent. I explain how...

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183: The Neuroscience Behind Doomscrolling

183: The Neuroscience Behind Doomscrolling

In this episode of the Health Upgrade Podcast, I dive into the science behind doomscrolling, from why we get stuck endlessly on our phones late at night to what’s really happening inside our brains an...

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182: Are Vagus Nerve Stimulators Right for Everyone? Ask Us Anything #2

182: Are Vagus Nerve Stimulators Right for Everyone? Ask Us Anything #2

In this special “Ask Us Anything #2” episode of the Health Upgrade Podcast, Valerie Driscoll and Sara Tate join me to answer questions from our Health Upgraded community.We talk about what can happen ...

16 Syys 24min

181: Ultrasound vs. Electricity for Vagus Nerve Stimulation? f. Jon Hacker

181: Ultrasound vs. Electricity for Vagus Nerve Stimulation? f. Jon Hacker

In this episode of the Health Upgrade Podcast, we are joined by John Hacker, founder of NeurGear and creator of the ZenBud ultrasound vagus nerve stimulator. The conversation covers the science behind...

9 Syys 1h 15min

180: Taking the (Cold) Plunge

180: Taking the (Cold) Plunge

In this episode, I dive into the world of cold plunges, breaking down the science, the hype, and what really matters for your health. We discuss the latest research on cold exposure, including its imp...

2 Syys 31min

179: Understanding Apraxia and Autism f. Dr. Dana Johnson

179: Understanding Apraxia and Autism f. Dr. Dana Johnson

In this episode of the Health Upgrade Podcast, we are joined by Dr. Dana Johnson, a leading expert in occupational therapy and whole-body apraxia. Together, we explore the often-misunderstood world of...

26 Elo 1h 7min

178: Do Anti-Depressant Meds Lower HRV? Ask Us Anything #1

178: Do Anti-Depressant Meds Lower HRV? Ask Us Anything #1

In this special "Ask Us Anything" episode of the Health Upgrade Podcast, I am joined by Valerie Driscoll and Sara Tate to answer questions from our Health Upgraded community. The panel dives into a qu...

19 Elo 27min

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