Optimizing Muscle Activation in Cadets Using Electromyography Biofeedback During Anti-G Training.
Aerospace Medicine and Human Performance
|November 18, 2025
Summary
Electromyography (EMG) biofeedback improved muscle activation during anti-G straining maneuver (AGSM) training for novice cadets. Tailored feedback strategies are recommended for optimizing AGSM performance in aviation.
Area of Science:
- Aerospace Medicine
- Human Performance
- Motor Learning
Background:
- Effective anti-G straining maneuver (AGSM) execution is critical for pilots to maintain consciousness under high G-forces.
- Novice cadet training effectiveness for AGSM requires evaluation.
Purpose of the Study:
- To assess if electromyography (EMG) biofeedback enhances muscle activation patterns during AGSM training in novice cadets.
- To investigate the effects of visual and verbal feedback on AGSM performance.
Main Methods:
- 58 Brazilian Air Force cadets performed AGSM with sustained isometric contractions of leg and abdominal muscles.
- Two feedback conditions were tested: visual EMG feedback (real-time vs. none) and verbal feedback (instructor vs. none).
- EMG signals were recorded and normalized to peak activation during AGSM trials.
Main Results:
- Verbal feedback improved gastrocnemius activation but decreased vastus medialis activation.
- Combined visual and verbal feedback yielded the highest rectus abdominis activation.
- Visual feedback alone showed minimal impact across all tested muscles.
Conclusions:
- EMG biofeedback facilitates motor learning of AGSM by selectively enhancing targeted muscle activation.
- Feedback effects are muscle-specific, indicating a need for tailored training strategies.
- EMG biofeedback can be a valuable tool for AGSM training, especially for novices or in facilities lacking centrifuges.
