I'm 57 and in my 2nd year of riding. Did my first 50 miler just over a year ago. Have ridden a metric maybe 3 or 4 times. I did a 50 yesterday and what I started thinking about is that it doesn't really seem any easier to do than it was a year ago. I've put in around 6k miles and you'd think I'd get in better shape to make a 50 not as tiring to do. Don't get me wrong, I like how I feel after riding these long rides, I'm just wondering why it's not really getting easier. Does it just take more time or am I a wuss?