Featured Research

from universities, journals, and other organizations

Exercise may affect food motivation

Date:
September 12, 2012
Source:
Brigham Young University
Summary:
It is commonly assumed that you can 'work up an appetite' with a vigorous workout. Turns out that theory may not be completely accurate -- at least immediately following exercise. New research shows that 45 minutes of moderate-to-vigorous exercise in the morning actually reduces a person's motivation for food.

A BYU student wears an EEG recording device to demonstrate how researchers measured neural responses to food after exercise.
Credit: Image courtesy of Brigham Young University

It is commonly assumed that you can "work up an appetite" with a vigorous workout. Turns out that theory may not be completely accurate -- at least immediately following exercise.

Related Articles


New research out of BYU shows that 45 minutes of moderate-to-vigorous exercise in the morning actually reduces a person's motivation for food.

Professors James LeCheminant and Michael Larson measured the neural activity of 35 women while they viewed food images, both following a morning of exercise and a morning without exercise. They found their attentional response to the food pictures decreased after the brisk workout.

"This study provides evidence that exercise not only affects energy output, but it also may affect how people respond to food cues," LeCheminant said.

The study, published online, ahead of print in the October issue of Medicine & Science in Sports & Exercise, measured the food motivation of 18 normal-weight women and 17 clinically obese women over two separate days.

On the first day, each woman briskly walked on a treadmill for 45 minutes and then, within the hour, had their brain waves measured. Electrodes were attached to each participant's scalp and an EEG machine then measured their neural activity while they looked at 240 images -- 120 of plated food meals and 120 of flowers. (Flowers served as a control.)

The same experiment was conducted one week later on the same day of the week and at the same time of the morning, but omitted the exercise. Individuals also recorded their food consumption and physical activity on the experiment days.

The 45-minute exercise bout not only produced lower brain responses to the food images, but also resulted in an increase in total physical activity that day, regardless of body mass index.

"We wanted to see if obesity influenced food motivation, but it didn't," LeCheminant said. "However, it was clear that the exercise bout was playing a role in their neural responses to the pictures of food."

Interestingly, the women in the experiment did not eat more food on the exercise day to "make up" for the extra calories they burned in exercise. In fact, they ate approximately the same amount of food on the non-exercise day.

Larson said this is one of the first studies to look specifically at neurologically-determined food motivation in response to exercise and that researchers still need to determine how long the diminished food motivation lasts after exercise and to what extent it persists with consistent, long-term exercise.

"The subject of food motivation and weight loss is so complex," Larson said. "There are many things that influence eating and exercise is just one element."

Bliss Hanlon, a former graduate student at BYU, was the lead author on the study and Bruce Bailey, an associate professor of exercise science, was a co-author on the study.


Story Source:

The above story is based on materials provided by Brigham Young University. Note: Materials may be edited for content and length.


Cite This Page:

Brigham Young University. "Exercise may affect food motivation." ScienceDaily. ScienceDaily, 12 September 2012. <www.sciencedaily.com/releases/2012/09/120912161554.htm>.
Brigham Young University. (2012, September 12). Exercise may affect food motivation. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2012/09/120912161554.htm
Brigham Young University. "Exercise may affect food motivation." ScienceDaily. www.sciencedaily.com/releases/2012/09/120912161554.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Experimental Ebola Vaccine Shows Promise In Human Trial

Experimental Ebola Vaccine Shows Promise In Human Trial

Newsy (Nov. 27, 2014) — A recent test of a prototype Ebola vaccine generated an immune response to the disease in subjects. Video provided by Newsy
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) — Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins