Which is Better & Burns More Calories? by Olivia Raffelsberger, Sports Scientist What’s better: running indoors on a treadmill or racking up the kilometers outside in the fresh air? Is the treadmill easier on my joints or is it more effective if I train for my race outside?  Either way, running is the ideal cardio training. Whether inside or out — you stimulate your muscles, get your heart rate up, and burn calories. However, it’s always a good idea to…