A lot of women I know have taken their babies with them to yoga class. I've never gotten into the baby-mom-yoga thing (sorry, this does not sound like fun to me!), and I don't know that I could get into a new trend that pairs people with dogs on yoga mats.
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Maybe the idea of exercising with your pooch sounds appealing to you. If so, you might be into "doga," a newish yoga spin-off that is raising eyebrows and, um, wagging tails (sorry, couldn't resist).
Here's how doga works: Grab a mat, grab your pooch and use him as a prop, of sorts, during your poses. The dogs get in on the action too--you give them massage and acupressure treatments during the hour. (If this is sounding a tad weird to you, you're not alone.) The New York Times wrote about the trend recently, too. Funny photos, here.