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The aim of the study was to investigate the psychological features, sleep quality and daytime sleepiness of different chronotypes in healthy young participants. Seventynine female and 63 male medical students aged between 17 and 23 years (mean age: 19.8 + 1.3 years) participated voluntarily in this study. They completed the Morningness-Eveningness Questionnaire, self-reported symptom inventory SCL-90-R, the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale. Psychological symptoms and sleep features of morning types, evening types and intermediate types were compared with each other. Out of 141 subjects, 30 were evening types (21%), 34 were morning types (24%) and 77 were intermediate types (55%). Positive-symptom total scores of SCL-90-R were higher in the evening types than the morning and intermediate types. There were significant differences in the psychological symptoms of anxiety, obsessive-compulsiveness, hostility and phobia among these groups (p 5 0.05). Total sleep quality was poorer and daytime sleepiness was significantly higher in the evening types than the morning and intermediate types (p 5 0.05). Our findings suggest that evening chronotypes suffer from more anxiety, obsessivecompulsiveness, hostility and phobia symptoms, sleep problems and daytime sleepiness than the other chronotypes.

The aim of this study was to investigate the plasma adipokine responses to high-intensity interval training (HIT) in overweight/obese women. Twelve women (age 21.7 ± 3.8 years) completed a 19 days of HIT comprising six session of 4-6 repeats of a Wingate test (0.065 kg load/kg). Plasma adipokine levels were measured before exercise, and at 5 and 90 min after exercise on the first and the last training days. Adiponectin was higher at 5 min than 90 min post-exercise (11.7 ± 7.3 and 10.5 ± 5.8 ng/ml; p = .01) in the first exercise day. Leptin decreased 5 min after exercise (23.6 ± 13.2 vs. baseline 27.8 ± 14.4 ng/ml; p < .01) and remained depressed following 90 min (p < .01). The changes in adiponectin and leptin concentrations were similar on the first and last exercise days. No consistent effect was found on resistin concentration. Future studies are required to disclose the functional consequences of these alterations in plasma adipokine levels.