Issues of definition: stress= the non-specific mental or somatic result of any demand upon the body, coping= strategies that an individual employs to deal with stresses caused by ever changing demands of the environment. These concepts have always existed but are defined differently by everyone: stress literacy= degree to which an indiv (or community) is knowledgeable about the effects of stress. Beings with a useful defn of stress. Research on stress problematic b/c lack of consensus on meaning of it (same for term coping: selye said that for most ppl stress viewed as a negative thing and is equated w/distress. Eustress= positive yet stressful experience (state of physical and psychological well being associated w/increased motivation and acceptance of challenge) This term coind to deal with negative position on word stress : essential is sense of balance- function best when stress to produce optimal level of arousal. First used term stress (taken from physics), later changed to strain.