unsure about ultimate frisbee calories burnt?

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Hey. So I play ultimate and i'm running around on a field, jumping, and basically going through the same endurance any sport on a field deals out-but I don't want to overestimate my calories burnt and myfitnesspal says it's around 430 calories per hour of frisbee. I played for 2 hours today, should I use the actual calorie count here that I don't trust? Maybe put it as soccer? How are these things figured out? :flowerforyou:

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