1: Body 2: Physical activity 3: Massage 4: Therapy 5: Protection 6: Muscular Strength 7: Food 8: Muscular Endurance 9: Training 10: Weight 11: Flexibility 12: Injury 13: Activity 14: Fitness 15: Nutrition 16: Muscle group 17: Exercise 18: Stretching 19: Energy 20: Pose (As of 11:15)
Ball-and-socket joint refers to one kind of triaxial joint to provide 3-degree-of-freedom motions
