PURPOSE: This study aimed to analyze the G-test results based on body composition and heart rate of fourth grade Air Force cadets, identify the relationships among body composition, heart rate, and G-resistance, and provide basic data for pilots and Air Force cadets to strengthen the G-tolerance.METHODS: This study used wearable devices to measure the heart rate and fatigue of 27 fourth-grade cadets of the Air Force Academy. Physical composition and physical fitness were assessed. Based on the measurement results, G-test result analysis and correlation analysis were performed.RESULTS: G-test results showed a steady heart rate (p=.015), deep sleep time (p<.001), and fatigue (p=.008) which have significant differences. Further, a 10-second heart rate at G-test (p<.001) and maximum heart rate (p<.001). There was also a statistically significant difference.CONCLUSIONS: Effective G-test success for Air Force cadets would require improving aerobic performance, continuous fatigue, and physical fitness management. If various variables that affect G-test are analyzed and applied to physical education and physical training through continuous research over the next 2–3 years, it is expected to have a better outcome on the G-test success for every cadet.

Objectives: Strong physical abilities and morphological symmetry are important factors for pilots to withstand aerial G-tolerance. Therefore, this study aimed to determine the symmetry difference between cadets by measuring functional movement screen (FMS) and functional leg length of Korea Air Force cadets for the first time and to understand the pass–fail relationship of the G-test by variable. Methods: Altogether, 72 fourth-year cadets (male, 72; mean age, 23.8 ± 0.6) were included in the study, and their body composition, FMS, functional leg length, and G-test results were measured. Results: The G-test results according to the FMS score revealed that the G-test passed (GP) group scored significantly higher than the G-test failed (GF) group in terms of the following: hurdle step (p =0.000), inline lunge (p = 0.006), active straight leg raise (p = 0.001), and T = trunk stability push-ups (p = 0.001). Conclusions The G-test results according to leg length demonstrated a significant difference between both groups. Morphological symmetry of leg length is an important factor in the functional aspect of exercise and exercise persistence. Moreover, a high G-test success rate can be expected if a follow-up study is conducted to improve the symmetry and balance of the body of air force cadets.

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