The hitting the "wall" or bonking is definately physical even when it seems mental.When the glycogen reserves in the body are depleted and the carbohydrates loaded are depleted and there is no more food to replenish the caloric burn and the body can't breakdown fat or muscle tissue reserves then the body runs out of fuel and quits functioning.Heretofore referred to as hitting the wall or bonking.
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Marathoners used to call bonking "hitting the wall," but it's actually a bodily form of sedition. In some form or another, it becomes a collapse of the entire system: body and form, brains and soul. * Consider the muscle-glycogen bonk, where the brain works fine but the legs up and quit. Then there's the blood-glucose bonk, where the legs work fine but the brain up and quits. Let's not forget the everything bonk, a sorry stewpot of dehydration, training errors, gastric problems, and nutrition gaffes.
