Notes

1 A. A. Berlin, W. H. Kop, and P. A. Deuster, 2006. “Depressive Mood Symptoms and Fatigue After Exercise Withdrawal: The Potential Role of Decreased Fitness,” Psychosomatic Medicine 68: 224–30.

2 J. A. Blumenthal et al., 1999, “Effects of Exercise Training on Older Patients with Major Depression,” Archives of Internal Medicine 159: 2349–56.

3 NPD Group, 2010, Gamer Segmentation 2010 Report, May.

4 Alain de Botton, 2009, The Pleasures and Sorrows of Work (London: Penguin).

5 Dante Alighieri, The Divine Comedy, vol. 1, Inferno, canto 5, lines 121–23, trans. Michael Clark.

6 P. L. Hewitt and G. L. Flett, 1991, “Dimensions of Perfectionism in Unipolar Depression,” Journal of Abnormal Psychology 100: 98–101.

7 United Nations, 2014, World Urbanization Prospects: The 2014 Revision, Highlights. Department of Economic and Social Affairs, Population Division.

8 Plutarch, 1920, Lives, vol. 9, Pyrrhus, 21.9.