Original Article
Study on anti-G ability and cardiopulmonary endurance of pilots
Li Xue, Xu Jianhua, Liu Yong, Jiang Guohua, Wang Yongchun, Ma Jin, Zhou Jiaheng, Fei Xiangwu, Chen Xiaojian, Wu Qi, Wang Qingju, Huang Wei
Published 2022-12-15
Cite as Chin J Aerospace Med, 2022, 33(4): 193-198. DOI: 10.3760/cma.j.cn113854-20220720-00096
Abstract
ObjectiveTo explore the relationship among maximal oxygen uptake (VO2max), heart rate recovery after exercise (HRR) and anti-G ability of fighter pilots.
MethodsA total of 90 fighter pilots were selected by cluster sampling method, and the +Gz tolerance that devoted by anti-G staining manoeuvre performing was predicted by anti-G and anti-hypoxia ability detector and G tolerance empirical formula. The values of VO2max and HRR were collected under 25 W/min power increasing rate scheme. According to the level of VO2max, pilots were divided into 3 groups: low level (the bottom third), intermediate level (the middle third) and high level (the top third). The differences of HRR value and +Gz tolerance increment among the first, second and third minutes after exercise were compared among the pilots of different level of VO2max. The correlation among the values of HRR, VO2max and +Gz tolerance increment were analyzed.
ResultsThere were significant differences in the values of HRR and +Gz tolerance increment at the second and the third minutes of exercise among the pilots with different VO2max levels in 3 groups (F=7.65, 10.64, 10.28, all P≤0.001). There was no obvious correlation between the values of HRR, VO2max and +Gz tolerance increment at the first minute after exercise (r=0.020, -0.017, P=0.852, 0.871). The value of HRR at the second minute after exercise was positively correlated with VO2max (r=0.288, P=0.006), but not obviously with the +Gz tolerance increment (r=-0.017, P=0.150). The value of HRR value at the third minute was positively correlated with the increase of VO2max and +Gz tolerance increment (r=0.433, 0.240, P<0.001, =0.023). VO2max was positively correlated with the increase of +Gz tolerance increment (r=0.436, P<0.001).
ConclusionsThe increase of pilots′ VO2max is conducive to the improvement of anti-G ability. The value of HRR at the third minute after exercise can be used as a sensitive monitoring index to predict pilot′s G-tolerance.
Key words:
Heart rate; Exercise; Oxygen uptake; Anti-G ability; Pilots
Contributor Information
Li Xue
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Xu Jianhua
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Liu Yong
Department of Aerospace Medicine, Air Force Medical University, Xi′an 710032, China
Jiang Guohua
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Wang Yongchun
Department of Aerospace Medicine, Air Force Medical University, Xi′an 710032, China
Ma Jin
Department of Aerospace Medicine, Air Force Medical University, Xi′an 710032, China
Zhou Jiaheng
Department of Aerospace Medicine, Air Force Medical University, Xi′an 710032, China
Fei Xiangwu
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Chen Xiaojian
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Wu Qi
First Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310013, China
Wang Qingju
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
Huang Wei
Second Sanatorium of Air Force Healthcare Center for Special Services Hangzhou, Hangzhou 310007, China
