A few years ago, I found myself having a similar conversation about digital measures time and time again with partners at pharma and biotech companies: Study team: “We want to measure activity using a sensor at home.” Me: “Activity is broad. HumanFirst’s Atlas platform catalogs 50+ ways activity could be measured — what’s most interesting to you?” Study team: “Let’s do moderate to vigorous activity ” Me: “Oh excellent. There are over 1000 ways that measure has been reported in the literature with different time domains, accelerometer cut points or METs .”