A Correlation Pilot-Study of F-15/16 Pilots’ ACTN-3, G-tolerance, and Body Compositions
2018
Seung-Hwan Shin
PURPOSE The purpose of this study is to investigate the relations among ACTN-3 polymorphism (RR, RX, XX), G-tolerance (breath cycle) at 9 G-test (15 seconds), and body compositions for F-15/16 pilots’ selection, plane deployment and safe service. METHODS 21 male F-15/16 pilots (29.3±1.00 years, 173.5±6.3 cm, 78.6±10.97 kg) voluntarily participated (ASMC-17-IRB-009). ACTN-3 polymorphism (RR, RX, XX) were analyzed from venous blood 3 mL. Participants did G-test (9 G, 15 seconds) for measuring G-tolerance from mean breath cycle (second) and measured body compositions (height [cm], weight [kg], muscle mass [kg], fat [kg], %), BMI [kg/m2]). Using SPSS 19.0 (for windows), G-tolerance and body compositions were analyzed by ACTN-3 polymorphism and correlations between G-tolerance and body compositions were analyzed. RESULTS ACTN-3 polymorphism showed, 6 ‘RR’, 10 ‘RX’, 5 ‘XX’. There was no significance in G-tolerance and body compositions by ACTN-3 polymorphism, in correlation between G-tolerance and body compositions. But, ‘RR’ could be inferred predominant in G-tolerance from longest mean breath cycle. In G-tolerance, muscle mass showed positive and fat showed negative trend. Pilots’ mean BMI was judged as obesity. CONCLUSIONS By ACTN-3 polymorphism, no significance was showed in G-tolerance and body compositions at high G-test (9 G, 15 seconds). For proving ‘RR’s predominant possibility, more participants and long G-test time are needed. From muscle mass’ positive and fat’s negative trend with G-tolerance, and pilots’ obesity, body composition management education is needed.
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