Canon 70-300 IS USM vs 70-300 L IS USM

I can tell you from experience that at our age every year makes a difference. I just refuse to let it stop me although things can easily happen.

About 3-4 years ago I suddenly noticed I had what I thought was a pulled groin. After 3-4 months I decided it wasn't healing and looked into it. I couldn't walk more than 5 minutes.

Five weeks later I had a hip replacement and 5 months later I walked 8 hours in one day without a problem. It just depends what it is.