Was doing a lot of biking back in the early to mid 80's. Took a spill and popped my right knee cartilage. Gave up biking and got involved in other hobbies. Now at 78 I'm back on the bike again. Been at it for about 6 months. Thought I was in pretty good shape. But I can say one thing, my legs needed a lot of work. Doing a lot of back and leg strengthening exercises. But the more riding you can do the better. I'm in this for the enjoyment and exercise. But I'm still going to push myself. Good Luck