Sample Calorie Expenditures. According to MayoClinic.com, a 160-lb. person burns 913 calories rollerblading at an average pace for one hour. In that same hour, someone who is 200 lbs. will burn 1,138 calories and a 240-lb. person will burn 1,363 calories. In addition to burning calories, Rollerblading provides a good workout for calves, hamstrings and the lower back. Inline skating is considered a low-impact exercise.