I posted here back in fall of 2023 (New Take on VO2max - #9 by CaseyB23). The model is now open to the public here: CycleWatts Model. There are instructions for use in a link on the left side of home page.
I recently had an opportunity to have myself tested in a clinical sports science lab to partially validate the model. I rode my indoor trainer 2 days before the clinical test, and submitted that to my model. In the lab, they warmed me up at about 140 watts, then incremented the wattage by 20 watts every 90 sec. At 240 watts, my heart rate plateaued at 162 and the test was stopped. My model simulation predicted a max wattage of 242 at HR of 163 (the model stops at the max heart rate listed in demographics file).
I would be interested in any comments, good or bad, if anyone has a chance to submit some files to the model. Contact me at exercyclewatts@gmail.com for further information or comments.