Having some type of metric to reference makes it easier to work toward fitness goals. If someone wants to eat healthier to lose weight, for instance, counting calories is much better than simply "trying to eat better" without setting measurable boundaries. Another popular metric is step counting. Everything from smartwatches to phones can already collect this type of data, and it provides a reasonably good approximation of one’s level of physical activity.
This is a companion discussion topic for the original entry at https://www.edgeimpulse.com/blog/upgrade-your-step-counting-with-edge-impulse