Featured Research

from universities, journals, and other organizations

Overweight Kids Need Less Intensive Exercise For Effective Weight Loss, Study Suggests

Date:
April 2, 2008
Source:
British Medical Journal
Summary:
Overweight kids are better off doing less intensive exercise if they are to shed the pounds effectively, suggests a study of pubescent boys. The researchers assessed the rate at which fat was burned (fat oxidation) during graded leg cycling exercises in thirty 12 year old boys, 17 of whom were obese. The others were lean and healthy.

Overweight kids are better off doing less intensive exercise if they are to shed the pounds effectively, suggests a study of pubescent boys, published ahead of print in the British Journal of Sports Medicine.

Related Articles


The researchers assessed the rate at which fat was burned (fat oxidation) during graded leg cycling exercises in thirty 12 year old boys, 17 of whom were obese. The others were lean and healthy.

The intensity of the exercises increased every 3.5 minutes, with the aim of finding the level of exercise intensity required to burn off the most fat, known as the “Fat Max.”

The Fat Max is determined by the amount of oxygen breathed in and the amount of carbon dioxide breathed out per minute as the exercise intensity increases, calculated as the VO2 peak.

The results showed that the average values of the VO2 peak for the two groups varied considerably, with the lean boys burning much more fat than the fat boys at higher exercise intensity. Among the lean boys the VO2 peak steadily increased before it began to level off at around 50%, although it was still increasing at 60%. The VO2 peak also increased in the obese boys, reaching the same level as the lean boys at 30%, equating to low intensity exercise.

But it then levelled off, before falling sharply at 50%, equating to moderate intensity exercise.

In other words, obese boys reached their Fat Max at much lower levels of exercise intensity than the lean boys. And more intensive exercise did not burn off more fat for them. The authors suggest that this is because obesity, and the sedentary lifestyle it induces, reduces muscle capacity as well as its requirement for, and ability to use, fat as fuel.

And obesity changes muscle type. Obese people have higher levels of type 2 “fast twitch” muscle fibres, which burn off more carbohydrate. Lean people have a higher proportion of type 1 muscle fibres, which burn off more fat, they add.

Journal reference: Comparison of fat oxidation during exercise in lean and obese pubertal boys: clinical implications. Online First Br J Sports Med 2008; doi 10.1136/bjsm.2007.044529


Story Source:

The above story is based on materials provided by British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

British Medical Journal. "Overweight Kids Need Less Intensive Exercise For Effective Weight Loss, Study Suggests." ScienceDaily. ScienceDaily, 2 April 2008. <www.sciencedaily.com/releases/2008/03/080331221148.htm>.
British Medical Journal. (2008, April 2). Overweight Kids Need Less Intensive Exercise For Effective Weight Loss, Study Suggests. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2008/03/080331221148.htm
British Medical Journal. "Overweight Kids Need Less Intensive Exercise For Effective Weight Loss, Study Suggests." ScienceDaily. www.sciencedaily.com/releases/2008/03/080331221148.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hikers Rescued After Fall from Oregon Mountain

Hikers Rescued After Fall from Oregon Mountain

AP (Feb. 1, 2015) Two climbers who were hurt in a fall on Mount Hood are now being treated for their injuries. Rescue officials say they were airlifted off the mountain Saturday afternoon by an Oregon National Guard helicopter. (Feb. 2) Video provided by AP
Powered by NewsLook.com
Smart Glasses Augment Reality to Help Visually Impaired

Smart Glasses Augment Reality to Help Visually Impaired

Reuters - Innovations Video Online (Feb. 1, 2015) New augmented reality smart glasses developed by researchers at Oxford University can help people with visual impairments improve their vision by providing depth-based feedback, allowing users to "see" better. Joel Flynn reports. Video provided by Reuters
Powered by NewsLook.com
Flu Season Hitting Elderly Hard

Flu Season Hitting Elderly Hard

Reuters - US Online Video (Jan. 31, 2015) The CDC says this year&apos;s flu season is hitting people 65 years of age and older especially hard. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
CDC: Get Vaccinated for Measles

CDC: Get Vaccinated for Measles

Reuters - US Online Video (Jan. 30, 2015) The CDC is urging people to get vaccinated for measles amid an outbreak that began at Disneyland and has now infected more than 90 people. Linda So reports. Video provided by Reuters
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