Genotype, Body Composition, Fitness, and +G Tolerance in Senior Cadets.

This study aimed to investigate the relationships among , body composition, fitness, and +G tolerance for senior cadet training development and their safe task performance. The subjects were all senior cadets ( = 68) at the Korea Air Force Academy. All cadets are required to pass a physical fitness test (3-km running, sit-ups, push-ups) and body composition test on a semiannual basis. Isokinetic muscle function (strength and endurance), +G test (+6 G ⋅ 30 s), and target gene () were analyzed. The effects of body composition and physical fitness along with the relationship of the genotype to the +6 G test results were determined. Consequently, no significant difference was found concerning the effect of on the +6 G test result, body composition, and physical fitness; however, body fat (%) and isokinetic muscle strength (peak torque right leg extension and left leg flexion) showed significance between the pass and failure groups in the +G test. The cadets of the Korea Air Force Academy showed dominant fast genetic expression type based on their genotype [RR and RX ( = 51, 75%) > XX ( = 17, 25%)]. Body fat (%) and isokinetic muscle strength (PT R EX, L FL) can be more effective predictors in the +6 G test for cadet training. Another speculation is that more RR- and RX-type-oriented training can promote cadets' G tolerance from the isokinetic factors such as high peak torque and low fatigue index.