I’ve been using the CORE sensor since June. My intentions were to add some heat training in preparation for my A-event at altitude (USA Masters Nats in ABQ, NM). Some research is claiming that heat training has a cross-over benefit for altitude. My heat training has been 2-3 indoor sessions a week for the past month with the goal of getting core temperature in my training zone. While I’ve seen core temps on outside rides in the training zone, it seems much more miserable inside with no air movement wearing winter clothing. Here’s an example of my indoor session. My goal is to get temperature up quickly then maintain temperature in my zone (dashed green lines) by adjusting my output and/or adding a fan, removing clothing.
For my racing (short crits and road events), the data on-bike is mostly unactionable. I’d guess ultra-endurance athletes and racers doing long events may have more utility from the data it provides in real-time, e.g. not getting overheated early in an event. I did notice a lot more riders during the tour dumping water over their bodies this year (maybe no more than other years and I’m just picking up in it now).