https://www.whoop.com/us/en/thelocker/podcast-139-introducing-the-whoop-4-0/
How WHOOP 4.0 measures health metrics and expands wearability
Learn how WHOOP 4.0 introduced Any-Wear options, SpO2, skin temperature, Health Monitor, haptic alarms, and a smaller sensor with better signal quality.
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https://gearjunkie.com/health-fitness/whoop-4-0-review
Whoop 4.0 Review: A Personal Trainer Weighs In After a Year
Jun 23, 2025 - Whoop is everywhere in sports-related media, adorning the wrists of many high-profile endurance and outdoor athletes, including rock climber Alex Honnold and...
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