
The relationship between fewer hours of sleep per day (sleep debt) and the incidence of obesity from 1960 to the present. As average daily sleep times have decreased, the incidence of obese adults has increased. Data points adapted from (Terman et al., 1913; McGhie et al.,. 1962; Hammond, 1964; Tune, 1968; Tune, 1969; Palmer et al., 1980; Hicks et al., 2001; Punjabi et al., 2003); National Sleep Foundation Polls 1995; 1998–2002; 2005; and CDC Polls 1962; 1974; 1980; 1994; 2000; 2002; and 2004. Critical Reviews in Food Science and Nutrition, 49:868–913 (2009) Copyright C