Originally Posted by Jarrett2

I'm 44 but still pay attention to this stuff. I'm not a long time, endurance competitor like the folks they talked about in the article. I start riding a little over 2 years ago. I have no intention of racing, but I do regularly do 50+ mile rides on the weekends and do 20+ mile rides most week days. I don't usually push too hard. Some days I'll chase a Strava KOM, but most days I just pedal along and never notice myself out of breath.

I hope they come up with a little more data for that gray area. I'd like to make sure I'm not inadvertently hurting myself when I'm trying to make myself better.