'Night owls', people with extreme late sleeping and waking habits, can 'retrain' their body clocks to improve sleep/wake timings, eating habits and decrease depression and stress. Over a three-week period, they were able to shift their circadian rhythm using non-pharmacological interventions.

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'Night owls', people with extreme late sleeping and waking habits, can 'retrain' their body clocks to improve sleep/wake timings, eating habits and decrease depression and stress. Over a three-week period, they were able to shift their circadian rhythm using non-pharmacological interventions.