“…Participants of Mexican descent (n=59), aged 18 to 38, were recruited from the San Antonio metropolitan area, through advertisements in the community and local college campuses. During an initial visit to the laboratory, participants underwent an in-person screening interview and a battery of self-report assessments designed to identify and exclude factors known to potentially affect the HPA axis including: lifetime depression (Bhagwager et al, 2005; Shea et al, 2007), use of oral contraceptives in the past 60 days (Meulenberg and Hofman et al, 1990; Pruessner et al, 1997,1999), current pregnancy (Meulenberg and Hofman et al, 1990), menstrual cycle abnormalities in the past 60 days (Suh et al, 1988; Bao et al, 2003, 2004), strenuous aerobic exercise (more than 2 hours per day for 4 or more days per week in the past 60 days (Kanaley et al, 2001; Hansen et al, 2008; Kelly et al, 2008), reported medical conditions and previous head trauma, use of medications, severe obesity (defined as a body mass index of > 30.0 kg/m 2 ) and, alcohol or other drug use disorders (Wand and Dobs, 1991; Huizink et al, 2006; Hansen et al, 2008). In addition, participants were excluded from the study who reported abnormal sleeping patterns, including disrupted sleep for more than one night per week, in the past 60 days, as determined by a 60-day sleep diary (Lasikiewicz et al, 2008), shift work including night shifts for the past week, overtime work for more than 8 hours per week in the past 30 days (Lundberg and Hellstrom, 2002; Clow et al, 2004; for review, see Hanrahan et al, 2006).…”