I bought a trainer watch to monitor my bpm and calories burned because I started exercising at home by doing fast dancing. I am 36, height 5'1, and weigh 150 lbs. My goal is to lose 20 pounds in two months. I have done two days of workout, and the calories I have burned are the following: Day One: 1.07 hours of workout shows I burned 907 calories. Day two: 50 min workout shows I burned 700 calories. The trainer said that if I wanted to be generous to shave off 100 from that, I would technically burn 807 and 600 calories if I do. I have a friend that works out who states that those numbers are unrealistic and that it is impossible to burn so much. I make salsa, merengue, and soca music, which are all fast. Are the numbers that unrealistic? I feel great after the workouts, I sweat a lot, and I am getting my energy back, which ultimately matters, but I do want to burn calories.