Physical fitness, flight requirements and age.
D000273:Adipose Tissue / Q000033:anatomy & histology; D000328:Adult; D000337:Aerospace Medicine; D000367:Age Factors; D000886:Anthropometry; D001823:Body Composition; D001835:Body Weight; D002320:Cardiovascular Physiological Phenomena; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009132:Muscles / Q000502:physiology; D010806:Physical Education and Training; D010809:Physical Fitness; D012119:Respiration; D012885:Skinfold Thickness; D013147:Spirometry