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What is a calorie? – Emma Bryce

Emma Bryce | TED-Ed

Click here for view full lesson.

We hear about calories all the time: How many calories are in this cookie?

How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting?

But what is a calorie, really? And how many of them do we actually need?

Emma Bryce explains how a few different factors should go into determining the recommended amount for each person.

Lesson by Emma Bryce, animation by Qa’ed Mai.