What is true about the anti-G straining manoeuvre?

The anti-G straining maneuver (AGSM) is a technique used by pilots and aircrew to counteract the effects of high G forces, which can lead to G-induced loss of consciousness (GLOC). One key aspect of the AGSM is that it involves not only tensing the muscles and maintaining intra-abdominal pressure but also managing the breathing pattern effectively.

The correct choice emphasizes that the AGSM must be sustained even after peak G is reached. This is vital because the physiological effects of high G forces can continue to impact the body as G forces decline. By maintaining the maneuver as G forces decrease, the body can better tolerate the transition and any residual effects, ultimately enhancing the pilot's ability to remain conscious and functional during critical flight maneuvers.

In contrast, the other options do not align with the effective application of the AGSM. For instance, muscle tensing should not be restricted to only brief bursts but rather sustained throughout the G-load phases. Maintaining a normal breathing cadence would not adequately support the critical process of increasing blood pressure and maintaining cerebral perfusion during G exposure. Applying the AGSM only once maximum G is achieved is ineffective, as it is essential to prepare for and counteract G forces as they begin to increase, rather