Tiredness
Tiredness is characterized by forgetfulness, impatience, a
gradual heaviness or weakness in muscles following work,
and sleepiness alleviated by rest, but it is not characterized
by any changes in social interaction or decreased control over
body processes. Tiredness is hypothesized to be an adaptive
response to stressors that occur during the alarm phase of the
GAS, outlined by Selye (1952, 1956). The antecedents of
tiredness are factors that challenge homeostasis. If adaptation
is effective, tiredness is relieved. If adaptation is not effective,
individuals eventually progress to fatigue.