I still don't have a power measuring device and prolly won't ever have but power data fuels thought and since I'm seasoned and getting older and practically reached a point where I cannot improve and all my physiological parameters start to decline I want to know how power outputs change with age in trained individuals. I hope coaches who use power in training might have collected some data and can share some of the data with us. I can only surmise that peak power values should go down a bit faster that FTP but the speed of decline is much mre interesting thing.