G'day, I'm another Aussie and I'm well into the over 50s age-group.  I've just joined MayMyWalk and have a couple of walking routes mapped, but I'm still feeling my way around this site.  I walk an average of 5 km a day (I think!) but I've found the distances estimated onthis are less than the distances I've measured with the car.   Late last year I had major back surgery and I discovered that walking is the best exercise for people with sore backs.  Not sure about knees.  Anyway, I go by the "Use it or Lose it" philosophy, which becomes a bit more important at our age.   Cheers,

Hi  Margaret I also am in my 50s and walk. I tried running a bit but its too hard on my knees and hips.I like the mapping program here because it keeps me motivated. I would rather sit! Esther