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Lifelong PA (Children (Psychological, Mechanical, Social, Physiological),…

- - - - CDC (1995) https://wonder.cdc.gov/wonder/prevguid/p0000391/P0000391.asp#Figure_1
  - - - Marshall (2004) demonstrated that physical activty programmes in the workplace were effective at reducing stress and increasing job satisfaction.
        
        Cook et al (2007)
      - Leininger et al (2014)- four week Workplace Walkoff Competition. significant decrease in perceived stress pre- to post-competition (PSQ Mean Score = 0.32±0.16 vs. Mean Score = 0.27±0.12, p = 0.012). In women
    - - Evans, Hammond, & Frederickson,(1988)- Have diverse effects including involvement in addiction, pain regulation, cardio-vascular regulation, respiration, appetite and thirst, gastrointestinal activity, renal function, temperature regulation, metabolism, hormonal secretion, reproduction, immunity, learningand memory
      - Endorphins are released after prolonged exercise but we don't know a lot about chemical release during exercise because it is really difficult to assess what's going on in the brain Lots of research is done in rats, which have some brain similarities. Physical activity causes endorphins to be released
      - Dishman and O'Connor (2009)- Endogenous opioids (endorphins, enkephalins, and dynorphins)are peptides that have biochemical properties similar to exogenousopiates such as heroin and morphine.