Performance data is collected on Iwatch 4 and Iphone XR. The NordicTrack has an Ifit app also. I think it will load all that data into my tablet.
I am a retired engineer having worked 22 years with class 3 medical devices. 69 years old and I have been walking 5 miles, 3-4 times a week for about 6 months after a year of inactivity. I used a nice elliptical at work for many years so have a pretty good personal baseline that's why I am amazed at the recent progress. It is not a valid scientific experiment I know. Anyway, I would certainly be willing to contribute the data.
Another anecdotal tidbit. I had a large bottle of Aleve (Sams Club size) that ran out a couple weeks ago and I have not replenished it. No need. Makes me wonder.