(Photography: Thinkstock) This week’s Six-Week Slim-Down challenge? Tracking your fitness. Unfortunately it’s common for people to overestimate how much benefit they’ve done for their waistlines every time they work up a sweat. You may have given 110 percent in your workout, but it’s possible you only burned off half of that chocolate cake you just ate. But don’t be discouraged! Exercise is still super important for your overall health and essential to healthy weight loss. Plus, you can make things easier on yourself by focusing your time and energy on the workouts that burn the most calories. Here are some of the highest calorie burning activities for the outdoor exerciser: Shovelling snow – 422 calories* Ice skating – 476 calories Snowshoeing – 544 calories Cross-country skiing (vigorous) – 612 calories Running (6 miles per hour) – 680 calories *(All calorie burns are based on estimates for a 150-pound person exercising for one hour) And if you prefer to exercise indoors, try these high calorie burning classes on offer at your local GoodLife Fitness: Zumba Fitness (a feel-good dance fitness class) – 520 calories per class** BodyPump (a resistance training class with weights) – 560 calories per class BodyStep (an energizing step-based cardio workout) – 620 calories per class RPM (an indoor cycling workout set to music) – 675 calories per class BodyAttack (a sports-inspired cardio workout that builds strength and stamina) – 735 calories per class BodyCombat (a martial arts-inspired cardio workout) – 740 calories per class **(All average calorie burns are calculated by Zumba and Les Mills International respectively) Find more of the best calorie-burning workouts. You might also like:How to overcome weight loss hurdles as a fami... The next revolution in fitness Are you eating too much sugar? Would you eat fast food if you knew what was ... What your diet is missing: Tea!