Muscles 22 Muscle strength 16 Physical education and training 6 Physical fitness 6 Weight training 5 Exercise 4 Medicine 4 Physiological aspects 4 Sports 4 Athletes 3 Biochemistry 3 Exercise-Physiological aspects 3 Fatigue 3 Personal trainers 3 Physiology 3 Animal Genetics and Breeding, (New March 2000) 2 Animal Nutrition (General) 2 Animal Physiology and Biochemistry (Excluding Nutrition) 2 Animal nutrition 2 Arts 2 Bleeding 2 Bodybuilding 2 Bones 2 Coaching (Athletics) 2 Growth 2 Hormones 2 Human locomotion 2 Livestock 2 Meat Producing Animals 2 Molecular biology 2