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Why is the tech so old?
Kate Tolo states the technology dates from 1975, making it over 50 years old. This suggests the core principles for measuring physiological arousal have been established for decades. While the application to women's sleep arousal might be novel, the underlying sensing methods are well-proven.
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Bryan Johnson's partner Kate Tolo tests £12,000 device to track women's sleep arousalRelated explainers
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