It’s cold outside, so all the more reason to keep your exercise routine strictly indoors, right? Not so fast. There are plenty of health-promoting reasons to get your exercise groove on in the great outdoors this time of year. With the right warm gear, you can still enjoy many of your favourite warm-weather ways to keep fit, or go with the snow flow by enjoying winter sports like cross-country skiing that get your heart pumping. From gym-germ avoidance to lining your wallet with more green, here are the top reasons to take it outside.