Reading Eric's recent post on this subject, I am reminded that my runs "are not what they used to be" and I was wondering if The Cool Impossible can help me.

A few facts first: I've been running regularly for about 15 years. The most I've ever run is 10 km and just for the joy of it.  Most of the time, I run around 5 km, 3 or 4 times a week [alternate days].  As I am approaching my 75th birthday and just bought "The Cool Impossible", I would really like to do more, more efficiently…