Losing an hour of sleep thanks to Daylight saving time can disrupt a person’s circadian sleep rhythms which can lead to increased irritability, hunger and slower reflexes. “For most of us, the disruption is like a mini jet lag,” said UTMB’s Rizwana Sultana. “At work you may lack concentration, feel fatigued, and be sleepy in the middle of the day but it should pass in a few days.” [Note: Paid subscription required. Contact UTMB Media Relations for details.]