Re: I feel old, what's going on?
It's the terrain. I'm closer to 70 than 60, I ride on flat roads most of the time and can roll with the best of them , well most of the time at a relatively low heart rate. Put me in the hills or mountains, and my heart rate soars and I go backwards fast. Rollers are okay, it's the long grades that get me.
I agree with Too Tall, put away the tachs and speedometers and just ride. I did that in my fifties and found that I have more fun on my bike.
Il vero lusso è il tempo da dedicare alle proprie passioni.