I have a similar issue. I bought this fit band (http://amazon.com/dp/B08CZSQPZZ) linked to Google fit and Google fit feeds the info to Lumen. The fit band reads true to my tennis workout, but sadly Google fit only picks up when I am walking to the court as I don't play with my phone on me. So I have to manually put in a workout on Google fit. Wish the fit band and google fit would communicate better.