- Williams, J.M.; Getty, D.
- Effects of Levels of Exercise on Psychological Mood States, Physical Fitness and Plasma Beta-Endorphin.
- Perceptual and Motor Skills, 1986, Vol. 63, 1099 - 1105
- 0031 5125
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.