Changes in Body Composition and Physical Fitness According to ACTN-3 Gene Polymorphism in Male Air Force Cadets During 8 Weeks of G-tolerance Exercise Program
Autor: | Jong-Hwan Choi; Hyun-Seung Rhyu; Keun-Su Kim; In-Ki Kim |
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Sprache: | Englisch; Japanisch; Koreanisch; Chinesisch |
Veröffentlicht: |
2018 |
Quelle: | Directory of Open Access Journals: DOAJ Articles |
Online Zugang: |
http://ajkinesiol.org/upload/pdf/ajk-2018-20-4-50.pdf https://doaj.org/toc/2586-5595 https://doaj.org/toc/2586-5552 2586-5595 2586-5552 doi:10.15758/ajk.2018.20.4.50 https://doaj.org/article/2e9ebcfefdb9472e88b2b8ee3a600e2d https://doi.org/10.15758/ajk.2018.20.4.50 https://doaj.org/article/2e9ebcfefdb9472e88b2b8ee3a600e2d |
Erfassungsnummer: | ftdoajarticles:oai:doaj.org/article:2e9ebcfefdb9472e88b2b8ee3a600e2d |
Zusammenfassung
OBJECTIVES This study set out to develop and administer an 8-week G-tolerance reinforcement exercise program and examine changes to the body composition, cardiovascular endurance, isokinetic muscular function, and G-tolerance ability of air force cadets according to the ACTN-3 gene polymorphism, thus testing the effects of the program on air force cadets according to the ACTN-3 gene polymorphism. METHODS For those purposes, the investigator analyzed the gene polymorphisms of ACTN-3 of 30 air force cadets, administered the developed G-tolerance reinforcement exercise program to and conducted analysis of its effects on their body composition, cardiovascular endurance, isokinetic muscular functions(muscular strength and endurance), and G-tolerance capacity(6G/30sec). RESULTS Found a significant increase in skeletal muscle mass in the RR and RX types, and body fat percentage in the XX type. the program caused a significant increase to the of the subjects across all the geno types and to their cardiovascular endurance in the RX and XX types. the dominant knee joint(right leg) and found a significant increase in the peak torque per body weight in the RX and XX type. As for the dominant knee joint(right leg), there was a significant increase in the total work per body weight in the RR, RX, and XX types. the G-tolerance ability in the RX than in the RR type, and and G-tolerance ability of XX type was also increased. CONCLUSIONS In summary, those findings demonstrate that there were differences in the changing patterns of air force cadets' G-tolerance ability according to the ACTN-3 gene polymorphism(RR, RX, and XX) after the G-tolerance reinforcement exercise program and that there was a more increase in the G-tolerance ability in the RX than in the RR type, and G-tolerance ability of XX type was also increased. Therefore, the G-tolerance reinforcement exercise program is verified as effective for reinforcing the G-toleran capacity of air force cadets who have either genotype RX or XX.