Measuring Neuromuscular Fatigue in Cervical Spinal Musculature of Military Helicopter Aircrew
REGINA UNIV (CANADA)
Pagination or Media Count:
Neck pain and muscle function in aircrew have received considerable attention. We hypothesized normalized electromyography EMG frequency would provide insight into appropriate methods to assess muscle fatigue in helicopter aircrew. METHODS 40 helicopter aircrew performed isometric testing that included maximal voluntary contractions MVC and 70 MVC endurance protocols of extension, flexion, and left and right lateral flexion for cervical muscles. Bilateral muscle activity in the splenius capitis, sternocleidomastoid, and upper trapezius was monitored with EMG. Normalized mean EMG frequency was calculated for each muscle at the start and end of the 70 MVC trials to determine which muscles fatigued and limited force maintenance during each isometric movement.
- Stress Physiology