1: Body 2: Physical activity 3: Protection 4: Exercise 5: Strength 6: Flexibility 7: Muscular Strength 8: Fitness 9: Muscular Endurance 10: Endurance 11: Training 12: Body Composition 13: Metabolism 14: Weight 15: Blood 16: Supplement 17: Energy 18: Pose 19: Balance 20: Spine (As of 01:52)
Ball-and-socket joint refers to one kind of triaxial joint to provide 3-degree-of-freedom motions
