Activity and happiness – Literature source

Several literature sources available e.g.:

Cramer SR, Nieman DC, Lee JW: The effects of moderate exercise training on psychological well-being and mood state in women. J Psychosom Res 35 (4-5): 437-449, 1991

Goldwater BC and Collis ML: Psychological effects and cardiovascular conditioning: a controlled experiment. Psychosom Med 47(2): 174-181, 1985.