January is a popular time to make fitness goals and to try out a new workout regiment. Orangetheory is the latest trend in fitness and  unlike other popular exercise classes, it uses technology to display your heart rate and number of calories burned on a screen at the front of class. There are no designated winners or losers during class, but seeing other classmates’ scores next to yours can help foster a healthy sense of competition and motivation. Lizzie O’Leary and Ben Johnson went to Orangetheory studios in Chelsea to check out the latest in fitness technology.