HOME >> BIOLOGY >> NEWS
Burning fat and carbohydrate during exercise

In a paper published in The Journal of Physiology, Helge, Stallknecht, Richter, Galbo, and Keins from Copenhagen shed light on fat oxidation during exercise and physical activity. Their observations suggest that fat oxidation during exercise reflects a fine interplay between the cardiovascular, neurological, endocrine and muscle metabolic systems.

During exercise and physical activity, the primary fuels used by muscles are carbohydrate and fat. When mild exercise is performed there is a tendency to burn relatively more fat and less glucose, but as exercise becomes more intense, a higher fraction of the energy demands of the muscle are supplied by glucose, until at the highest intensities almost only carbohydrates are used. Is this shift in fuel source a property of the muscle itself, or does it represent the interplay between what is happening in the muscle and the exercise-related responses in the rest of the body"

The study, performed at the Copenhagen Muscle Research Centre at the University of Copenhagen, examined muscle fuel utilisation in response to graded exercise performed with only one leg. Nine healthy males performed one-leg exercise at 25, 45, and 85% of maximal workload. Their results showed that, when only a small mass of muscle is contracting, and blood flow and oxygen supply are not limited by central circulatory capacity, the shift in fuel source from fat to glucose as exercise intensity increases does not occur.

Helge et al.s findings show that the adaptations in the rest of the body are the key to this fuel source shift during whole body exercise. They also help scientists understand why athletes "hit the wall" during events like the marathon, and they have implications for the adaptations made in middle-aged adults who are using exercise to prevent or treat conditions like diabetes and obesity. If the mechanisms can be fully understood, it may be possible to develop agents that allow fat oxidation to be maint
'"/>

Contact: Melanie Thomson
melanie.thomson@oxon.blackwellpublishing.com
44-186-547-6270
Blackwell Publishing Ltd.
18-Jun-2007


Page: 1 2

Related biology news :

1. Burning wetlands unleash sequestered mercury in wake of climate change
2. UGA researchers discover cell-wall carbohydrate that is crucial to anthrax bacterium
3. Disabling a carbohydrate trigger reduces obesity and appetite
4. Loss of central vision with age may be linked to quality of dietary carbohydrates
5. Reduced calorie and carbohydrate diet slows progression of Alzheimers disease in mouse model
6. Regulating alternative splicing during neural development
7. Slow wave activity during sleep is lower in African-Americans than Caucasians
8. Its safe for obese moms-to-be to lose weight during pregnancy, new SLU research finds
9. Alcohol use during pregnancy leads to greater risk of extreme preterm delivery
10. Migraines during pregnancy linked to stroke and other vascular diseases
11. Carnegie Mellon University scientists identify genes activated during learning and memory

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/20/2016)... , Dec. 20, 2016 The rising ... rental and leasing is stoking significant interest in ... frequency technology, Bluetooth low energy (BLE), biometrics and ... the next wave of wireless technologies in the ... system to advanced access systems opens the market ...
(Date:12/16/2016)... , Dec 16, 2016 Research and Markets ... Market - Global Forecast to 2021" report to their offering. ... The biometric ... grow at a CAGR of 14.06% from 2016 to 2021. The ... is projected to reach 854.8 Million by 2021. The growth of ...
(Date:12/15/2016)... 15, 2016 ... Research and Markets has announced the addition of the ... The report forecasts the global military biometrics market to grow ... The report has been prepared based on an in-depth market analysis with ... growth prospects over the coming years. The report also includes a discussion ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... Research and Markets has announced the addition of the ... - Global Opportunity Analysis and Industry Forecast, 2014-2022" report to ... ... to reach $15,737 million by 2022 from $6,521 in 2015, growing ... Omic technologies segment accounted for more than half of the ...
(Date:1/19/2017)... , Jan. 19, 2017 /PRNewswire -- WuXi ... device open-access capability and technology platform, today announced ... leading biology focused preclinical drug discovery contract research ... will become a wholly-owned subsidiary of WuXi, and ... competences and providing greater services. The acquisition will ...
(Date:1/19/2017)... ... January 19, 2017 , ... November Research Group, ... biopharmaceutical and medical device manufacturers and regulators, is proud to announce the worldwide ... email client designed to provide product vigilance departments with the flexibility and ease ...
(Date:1/19/2017)... , Jan. 19, 2017 AquaBounty Technologies, ... on enhancing productivity in aquaculture and a majority-owned subsidiary ... that it has completed the listing of its common ... equity subscription from Intrexon. "AquaBounty,s listing on ... will broaden our exposure to the U.S. markets as ...
Breaking Biology Technology:
Cached News: