A few days ago I mentioned an NYT article on how dogs motivate people to exercise. I’ve found it to be absolutely true. But an even better motivator is my 4-month-old son. He loves the stroller. In fact, it’s one of the ways we get him to take a nap. I haven’t gotten back to my normal gym or yoga classes yet, but the area where we live in exurban L.A. is in the Santa Monica mountain range. So we have plenty of killer hills!