Lifehacker pointed me at this article in the New York Times:

An Enduring Measure of Fitness: The Simple Push-Up

According to the article, push-ups are really good for you. I’ve been doing sets of about 20 very irregularly. The article suggests that I should be able to do 27. Guess I need to get more regular about it.

I’ve kept off most of the weight I lost last year, and my yoga practice has helped a lot with my lower back. I just need to get a routine established, and do it!. Of course, routine is one of my challenges in this life…