Cover Image: September 2009 Scientific American Magazine See Inside

You Snooze, You Lose--Weight

Getting enough rest promotes weight loss














Share on Tumblr

Lose weight while you sleep? It sounds too good to be true—but recent research indicates that there is a connection between how much you weigh and the amount of shut-eye you get per night.

Two hormones, ghrelin and leptin, help to control appetite. When you do not get enough rest, levels of ghrelin, which increases hunger, rise; levels of leptin, which promotes feelings of fullness, sink. A study in the May issue of Psychoneuroendocrinology found a significant disruption in nighttime ghrelin levels in chronic insomniacs. According to the study, this hormone imbalance leads insomniacs to experience an increase in appetite during the day, leading to weight gain over time.

In addition to creating an imbalance in ghrelin and leptin, sleep deprivation causes levels of the stress hormone cortisol to rise, which increases cravings for high-carb, high-calorie “comfort foods.” Furthermore, the brain secretes growth hormone during the deep-sleep phase, helping the body convert fat to fuel. Without enough deep sleep, fat accumulates.

Sleep expert Michael Breus, clinical director of the sleep division at Southwest Spine & Sports in Scottsdale, Ariz., says that there is no magic number of hours people should sleep but that the average adult needs about five 90-minute sleep cycles per night, so 7.5 hours seems optimal as a minimum.

But simply getting under the covers is probably not a sufficient strategy to achieve long-term weight loss, Breus says. “What these findings suggest is that there’s a new triad to achieving a healthy weight: diet, exercise and enough sleep.”

Note: This article was originally printed with the title, "You Snooze, You Lose."


This article was originally published with the title You Snooze, You Lose.



Buy This Issue
If your institution has site license access, enter here.

7 Comments

Add Comment
View
  1. 1. geniusborn 04:51 PM 10/1/09

    In addition to this, a helpful hint I have learned is when eating a snack in the after dinner hours, try to eat colored fruits or veggies which increases your metabolism while sleeping. A great read years ago was "Eat More Weigh Less". I do not remember the authors name, nonetheless it was a great learning tool for me in my diet plan...

    Reply | Report Abuse | Link to this
  2. 2. NadineB 05:04 AM 10/7/09

    Well, I do believe that if you sleep your 8 hours, then you are going to balance your levels of ghrelin and leptin and you're not going to eat the stuff with the high calories in them!

    But i do not believe that you're gonna lose weight by sleeping, otherwise we would all spend our vacations sleeping!! haha!
    just thought i'd share my ideas!

    Reply | Report Abuse | Link to this
  3. 3. Todd29 10:01 AM 1/8/10

    Being overweight sucked, but after reading your book, I lost 85 pounds! Words can not express how good I feel! This is a comment which I recently received about the book Lose Weight Using Four Easy Steps

    Reply | Report Abuse | Link to this
  4. 4. Cora 08:54 PM 2/7/10

    I've tried using Adipex and it works for me. I purchased it online in www.medsheaven.com

    Reply | Report Abuse | Link to this
  5. 5. JoeHeller 02:01 PM 7/16/10

    I think that's just because you need more energy from food when you get less from sleep.

    Source: http://www.fitclick.com/weight_loss_tips

    Reply | Report Abuse | Link to this
  6. 6. grapedog 08:41 PM 9/20/10

    Well, you do "technically" lose weight while you sleep. Your metabolism slows down, but you are still burning calories. If you must eat before you go to bed, eat very little. I actually prefer to drink before bed instead of eating, lots of water and maybe an apple. Apples and bananas are very filling and soak up lots of water. A glass of water or two with a banana or an apple will fill you right up. The food is easy for the body to process, healthy and promotes better sleep. As opposed to something sugary or filled with caffine.

    Reply | Report Abuse | Link to this
  7. 7. healthyweightloss 07:59 PM 12/20/10


    Lack of Sleep>Stress>body produces Cortisol to fight stress>Cortisol Pros and Cons

    Pros
    1. Increase your alertness and energy level
    -no wonder we feel hyper active sometimes when we lack of sleep
    2. Glucose production increases to help the body produce more energy
    3. Body dsnt feel hunger
    -if you feel this a good point, i will explain later how this tend to ruin fast free weight lose
    4.Cortisol activates carbohydrates and fat to produce more energy

    The above good points are what cortisol can make during stress attempts to enter our system or the moment our brain sensed any stress coming our way.source <a href=" http://healthyweightlossways.blogspot.com" target="_blank"><strong>healthy weight loss </strong> </a>

    Reply | Report Abuse | Link to this
Leave this field empty

Add a Comment

You must sign in or register as a ScientificAmerican.com member to submit a comment.
Click one of the buttons below to register using an existing Social Account.

More from Scientific American

Follow Us:

See what we're tweeting about

Scientific American MIND

More »

Free Newsletters


Get the best from Scientific American in your inbox

Solve Innovation Challenges

Powered By: Innocentive

  SA Digital

Latest from SA Blog Network

  SA Digital

Science Jobs of the Week

Email this Article

You Snooze, You Lose--Weight: Scientific American Mind

X
Scientific American Mind

Subscribe Today

Save 66% off the cover price and get a free gift!

Learn More >>

X

Please Log In

Forgot: Password

X

Account Linking

Welcome, . Do you have an existing ScientificAmerican.com account?

Yes, please link my existing account with for quick, secure access.



Forgot Password?

No, I would like to create a new account with my profile information.

Create Account
X

Report Abuse

Are you sure?

X

Institutional Access

It has been identified that the institution you are trying to access this article from has institutional site license access to Scientific American on nature.com. To access this article in its entirety through site license access, click below.

Site license access
X

Error

X

Share this Article

X