I write about health and food. My husband Mike writes, too, but about technology. Every once in a while, our areas of specialization overlap.

Today Mike wrote about our daily walks together. While walking, we listen to podcasts, talk (both on the phone and to each other) and do other things. By using technology, we combine learning, talking and exercise -- and save a lot of time. You can, too.

Here's what my husband wrote about what he calls a "cell phone-based exercise program."