During which part of a G Force experience should the AGSM be initiated?

The appropriate time to initiate the Anti-G Straining Maneuver (AGSM) is after the onset of G Force. This technique is specifically designed to help mitigate the effects of increased G forces experienced during maneuvers in aviation. When G forces begin to act on the body, the AGSM should be employed to counteract the physiological effects, primarily to maintain blood flow to the brain, thereby preventing G-induced Loss Of Consciousness (GLOC).

Starting the AGSM too early, before the G forces are actually felt, would not provide any benefit, as it is meant to respond to the onset of the G forces. Conversely, performing it during the maximum G force or immediately after would also be ineffective, as the maneuver is intended to counteract the effects that are currently being felt, rather than dealing with residual effects after the forces have dissipated. Thus, timing the AGSM for just after G force onset optimally supports the body's response to maintain consciousness and cognitive function during high-performance maneuvers.