I ran this week. Monday an entire mile, and did the same thing Tuesday. This was at the gym during a class and it wasn't all at once. This is nothing compared to what you ladies are able to do - and frankly that is what my bike is for. However, I DID IT My knees were only moderately unhappy with me later - but my hamstrings were most unhappy and are finally about over it 3 days later. No riding since Monday morning because of it. Who would have figured that running would get hammies cranky

I am not about to take up running at 52, though if my knees were better I would love to take up trail running. I am starting a 6 week free summer cross-training class at my gym that will revolve around a physical challenge that the class starts/ends with and in-between we work with a trainer twice a week on various ways to get better and the running is a small portion of it.

It was kind of fun to just start running though - and my heart rate didn't get any higher than it does on the bike. I think I can see the attraction.