Ravi Solanki earned a medical degree and Ph.D. at Cambridge University and worked in an intensive care unit during the pandemic. But it wasn’t until last year, not long after moving to the San Francisco Bay Area for the artificial intelligence company he runs, that he paid attention to heart rate variability, or HRV.
Suddenly he was surrounded by techies and began wearing a wristband that tracks health and fitness data, per the local custom. He learned that HRV — basically a measure of how uneven your heart rate is — is correlated with brain and…
