Analysis of isokinetic test results of waist flexor and extensor muscles in helicopter pilots
10.3760/cma.j.cn113854-20201230-00179
- VernacularTitle:直升机飞行员腰腹屈伸肌群等速测试结果分析
- Author:
Baozhen HUANG
1
;
Yinong LIAO
1
;
Qiqi YANG
1
;
Jie LIU
1
;
Qingchun ZHU
1
Author Information
1. 空军杭州特勤疗养中心 310002
- Publication Type:Journal Article
- Keywords:
Psoas muscles;
Abdominal muscles;
Isokinetic test;
Peak torque;
Helicopter pilots
- From:
Chinese Journal of Aerospace Medicine
2021;32(2):99-102
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the strength characteristics of waist and abdominal flexor and extensor muscles of helicopter pilots in order to provide the basis for waist and abdominal strength training, endurance training and prevention of the lumbar injury.Methods:Seventy-eight male helicopter pilots, whose average age was 38.9±7.5 yrs, height was 173.3±3.0 cm, weight was 72.7±7.7 kg and BMI was 24.2±2.2 kg/m 2, were selected as subjects. Strength characteristics and work of waist and abdominal flexor and extensor muscles of helicopter pilots were detected with 2 angular velocities of 60°/s and 180°/s by using Isomed 2 000 Isokinetic Test System. The peak torques and the relative peak torques of flexor and extensor muscles were compared under same angular velocity and between different angular velocities. The difference of peak torques of flexor and extensor and the relative peak torques of flexor and extensor were compared between age groups (20-39 yrs and 40-59 yrs). Results:At the same angular velocity, the peak torque and relative peak torque of the waist and abdominal extensor muscles of helicopter pilots were higher than those of the flexor muscles ( t=5.43-8.90, P<0.01). The peak torque and relative peak torque of the waist and abdominal extensor and flexor muscles reduced with the increasing of angular velocity ( t=11.36-12.19, P<0.01). The peak torque of the waist and abdominal extensor and flexor muscles in significantly reduced with the increasing of age, but the relative peak torque of the waist and abdominal flexor and extensor muscles reduced, and the difference was statistically significant ( P<0.05 or 0.01). The qualification rate of peak moment ratio was very low, and the balance of flexor and extensor muscles was weakened. Waist and abdominal extensor muscle endurance was weaker than flexor muscle endurance, but the differences was not significant. Conclusion:It is suggested that we should scientifically strengthen the strength training of flexor muscles and the endurance training of extensor muscles, so as to improve the balance of flexor and extensor muscles, and to slow down the decline of lumbar and abdominal muscle strength with age growing.
