1: Body 2: Physical activity 3: Therapy 4: Stretching 5: Training 6: Balance 7: Flexibility 8: Muscle 9: Movement 10: Relaxation 11: Weight 12: Treatment 13: Fitness 14: Injury 15: Stretch 16: Contraction 17: Exercise 18: Health 19: Muscular Strength 20: Activity (As of 09:10)
Ball-and-socket joint refers to one kind of triaxial joint to provide 3-degree-of-freedom motions
