1: Protection 2: Body 3: Physical activity 4: Muscular Endurance 5: Muscular Strength 6: Exercise 7: Flexibility 8: Body Composition 9: Strength 10: Energy 11: Blood 12: Muscle group 13: Training 14: Spine 15: Cardiovascular Endurance 16: Endurance 17: Fitness 18: Metabolism 19: Food 20: Yoga (As of 11:59)
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Ball-and-socket joint refers to one kind of triaxial joint to provide 3-degree-of-freedom motions
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