| http://www.w3.org/ns/prov#value | - For example, the American Council on Exercise (ACE), which is the largest non-profit fitness-certifying organization in the world, offers the only NCCA-accredited group fitness certification and requires group fitness instructors to pass an intensive three-hour, 150-question exam that covers exercise science and programming knowledge, including anatomy, kinesiology, health screening, basic nutriti
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