How do you log in Ab Jam (Turbo Jam)?

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I have a heart rate monitor but for the life of me I can't figure out to get the heart rate part of the watch to unlock-therefore it's become useless so I don't really know my heart rate. I was wondering if someone could give me a general number of calories burned during this workout? I'm 28, 5'2 and 128 pounds. Thanks :-)