QA Mathematics 67 QC Physics 40 RA0421 Public health. Hygiene. Preventive Medicine 32 TP368-456 Food processing and manufacture 20 TX341-641 Nutrition. Foods and food supply 15 G Geography (General) 14 Physical education and training. Physical fitness 13 Sports 13 QD Chemistry 9 Games and amusements 8 Q Science (General) 8 Coaching 7 Public administration 7 GA Mathematical geography. Cartography 6 Recreational areas and facilities. Recreation centers 6 Relation to psychology. Sports psychology 6 T Technology (General) 6 Ball games: Baseball, football, golf, etc 5 Exercise 5 Musculoskeletal system. Movements 5 Mechanics. Kinesiology 4 Outdoor life. Outdoor recreation 4 Quality of life 4 TA Engineering (General). Civil engineering (General) 4 TJ Mechanical engineering and machinery 4 Athletic contests. Sports events 3 Football 3 Football games 3 Nutrition 3 Performance. Competence. Academic achievement 3