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Magazine
-
Dr Moritz Przybilla: A Cancer Biologist on What Really Matters for Long-Term Health
10 min read
-
Before You Try Peptides: What a Clinical Researcher Wants You to Know First
10 min read
-
Kayla Barnes-Lentz: The Woman Rewriting Female Longevity from the Inside Out
10 min read
Weekly picks on longevity, brands, and health science. No spam—unsubscribe anytime.
Community Discussions
Wearable EMF/radiation (SAR Rating) from WHOOP, Oura, Ultrahuman...
I’m currently testing the WHOOP 4.0 for sleep tracking, recovery, HRV, and RHR, and I started wondering about potential EMF exposure—specifically its SAR (Specific Absorption Rate) value—since I wear it close to my body at night.
Here are some quick SAR benchmarks from other wearables and phones (measured in W/kg):
WHOOP 4.0: 0.48–0.67
Oura Ring: 0.0003
Samsung Phone: 0.64
iPhone 15: 0.98
I appreciate that the Oura Ring offers an offline mode, but I didn’t go with it because I can’t wear a ring during my powerlifting sessions.
For context, the FCC SAR limit for wearable devices is 1.6 W/kg averaged over 1 gram of tissue. So WHOOP is well within the safe range. That said, there’s still limited evidence on the long-term health effects of frequent low-level EMF exposure.
Curious to hear your thoughts on this, Zapiens!
I’m currently testing the WHOOP 4.0 for sleep tracking, recovery, HRV, and RHR, and I started wondering about potential EMF exposure—specifically its SAR (Specific Absorption Rate) value—since I wear it close to my body at night.
Here are some quick SAR benchmarks from other wearables and phones (measured in W/kg):
WHOOP 4.0: 0.48–0.67
Oura Ring: 0.0003
Samsung Phone: 0.64
iPhone 15: 0.98
I appreciate that the Oura Ring offers an offline mode, but I didn’t go with it because I can’t wear a ring during my powerlifting sessions.
For context, the FCC SAR limit for wearable devices is 1.6 W/kg averaged over 1 gram of tissue. So WHOOP is well within the safe range. That said, there’s still limited evidence on the long-term health effects of frequent low-level EMF exposure.
Curious to hear your thoughts on this, Zapiens!
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