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Ripley the chocolate Lab is doing pushups. He pants in the cold autumn air as he sits, then lies down, then leaps up at the promise of a treat from his owner, Kate Castle of Somerville.
“Make sure you get at least 10 push-ups in,” certified personal trainer Mike Harb calls to the three dogs and three owners working out Thorndike Field in Arlington.
It was the last weekend of Harb’s first Fit Doggie and Me class, a new program where humans and their canine companions can exercise and train together. The next session starts Nov. 2 and 3 and runs for six weeks. Participants can sign up for either Saturday classes or Sunday classes. Registration costs $288 through the Arlington Recreation Department. For the first installment, two participants signed up for Saturday classes and two signed up for Sunday.