|Basic InformationLatest News|Sleepless Nights, Unhealthy Hearts?Curbing Sleep Apnea Might Mean Fewer Night Trips to BathroomHealth Tip: Slipping Back Into SleepPast Prescribing Behavior Predicts Choice of Insomnia RxWhat Guides Docs' Sleeping Pill Picks? 'Same Old Same Old,' Study SaysSkimp on Sleep and You Just May Wind Up SickSleepless Nights Linked to Asthma Later in LifeThe ABCs of Good ZzzzzsLevel 3 Polysomnography Data Noninferior for OSAJury Still Out on Whether to Screen All Adults for Sleep ApneaHealth Tip: 5 Things to Help You Sleep SoundlyMany Misuse OTC Sleep Aids: SurveyHomeless, And Often Sleepless TooHealth Tip: Struggling in the Morning?VA ECHO Program Feasible for Management of Sleep DisordersStudy Finds Genetic Link Between Sleep Problems and ObesityStudy Sees Link Between Insomnia, AsthmaWeb-Based Help for Insomnia Shows PromiseHealth Tip: When Sleep is InterruptedCPAP Improves Asthma Control, QoL for Adults With Asthma, OSASleep Apnea May Boost Risk for Post-Op ProblemsHome-Based CBT Program for Sleep Feasible in PregnancyHealth Tip: Making the Transition to SleepSleep Troubles, Heart Troubles?Why Some Women Find Good Sleep Tough to GetSleep Apnea Diagnoses Up Among Outpatients From 1993 to 2010For Those With Sleep Apnea, Maybe It's Time for a Driving TestMouse Study Suggests Brain Circuit Involved in Sleep-Wake CycleRisk of Cardiovascular Events Not Reduced With CPAP UseNighttime Sleep Disturbance Common in Chronic PainResistant Hypertension Linked to Increased Risk of Sleep ApneaDrowsy Driving Causes 1 in 5 Fatal Crashes: ReportStudy Links Sleep Problems to Stroke Risk, RecoveryHealth Tip: Considering a Sleep Study?Sleep Disorders 6 Times Higher Among VeteransHealth Tip: Exercise for Better SleepSleep Apnea Tied to Complications After AngioplastyUSPSTF Finds Evidence Lacking for Sleep Apnea ScreeningShift Work 'Unwinds' Body Clock, May Lead to More Severe StrokeShift Workers at Greater Risk of Heart Ills, Study SaysAssociated Professional Sleep Societies, June 5-9, 2010Sleep Disorder News FeedQuestions and AnswersLinksBook Reviews
Shift Workers at Greater Risk of Heart Ills, Study Says
by -- Robert Preidt
Updated: Jun 6th 2016
MONDAY, June 6, 2016 (HealthDay News) -- Sleep deprivation and an abnormal sleep cycle may increase the risk of heart disease, especially for shift workers, a small study suggests.
"In humans, as in all mammals, almost all physiological and behavioral processes, in particular the sleep-wake cycle, follow a circadian rhythm that is regulated by an internal clock located in the brain," said study lead author Dr. Daniela Grimaldi.
"When our sleep-wake and feeding cycles are not in tune with the rhythms dictated by our internal clock, circadian misalignment occurs," added Grimaldi, a research assistant professor at Northwestern University in Chicago.
The study results suggest that shift workers "who are chronically exposed to circadian misalignment, might not fully benefit from the restorative cardiovascular effects of nighttime sleep following a shift-work rotation," she added.
The study included 26 healthy people, aged 20 to 39, who were restricted to five hours of sleep for eight days with either fixed bedtimes or bedtimes delayed by 8.5 hours on four of the eight nights.
A higher heart rate during the day was seen in both groups, to a greater extent at night when sleep deprivation was combined with delayed bedtimes. Also, there was an increase in levels of the stress hormone norepinephrine in the sleep-deprived and delayed-bedtime group.
Norepinephrine can narrow blood vessels, raise blood pressure and expand the windpipe, the researchers noted.
They said sleep deprivation and delayed bedtime were also associated with reduced heart rate variability at night and reduced vagal activity during deeper sleep phases that normally have a restorative effect on heart function. The main effect of the vagal nerve on the heart is the lowering of the heart rate, the study authors said.
Shift workers should be encouraged to eat a healthy diet, exercise regularly and get more sleep to protect their hearts, the researchers said.
The study was published June 6 in the journal Hypertension.
The U.S. Centers for Disease Control and Prevention has more about shift work.
This article: Copyright © 2016 HealthDay. All rights reserved.