I like to take my dog out for walks (well, I have to anyway since he's half boxer/German shepherd & stays inside...) but I'll make them "active" walks. I make sure that the entire time I'm walking him, I'm keeping it interesting! If he stops to do his business, I'm doing calf-raises or "the-invisible-stair-climber" or something of the like to get my heart rate up. I'm more than sure I look like a serious idiot but hey, it works & I'm not having to fork out gym fees to get results, and luckily, I live on a mostly quiet back road out in the country so very few witnesses.