Navigation Links
Not only is she thinner than you ... her muscles work better, too
Date:3/20/2014

Bethesda, MD (March 20, 2014)We all know the type: The friend or colleague who stays slim and trim without much effort and despite eating the same high-calorie fare that causes everyone else to gain weight. As it turns out, the way the muscles of the inherently thin work may give them the edge.

Daily physical activity is an inherited trait with a strong association to how fat or thin a person is. Chaitanya K. Gavini et al. previously found that aerobic capacity is a major predictor of daily physical activity level among humans and laboratory animals. In their new study, they compared female rats with high aerobic capacity (genetic tendency toward leanness) or low aerobic capacity (genetic tendency toward obesity) to investigate how muscle physiology affects leanness.

Though the rats in each group were similar in weight and lean body mass, the rats with a high aerobic capacity were consistently more active than the low capacity rats. While all the rats had similar energy expenditures when at rest, big differences in energy expenditure (calorie burn) occurred during mild exercise. The researchers found the muscles of rats with lean genes demonstrated "poor fuel economy," meaning that they burned more calories when performing the same exercise as those with fat genes. This may be due to more lean rats having higher levels of proteins that support energy expenditure and lower levels of proteins that encourage energy conservation and/or an increased sympathetic nervous system role in powering the muscles of lean rats.

According to the researchers: "This has implications for how we consider metabolism when attempting to prevent or treat obesity. Targeting of pathways maximizing skeletal muscle energy use during physical activity may take advantage of already existing mechanisms that are endogenously employed to a greater extent in naturally lean people."

The article "Leanness and heightened nonresting energy expenditure: role of skeletal muscle activity thermogenesis" is published in the March 2014 issue of the American Journal of PhysiologyEndocrinology and Metabolism: http://ow.ly/uJ6ri.


'/>"/>

Contact: Stacy Brooks
sbrooks@the-aps.org
301-634-7209
American Physiological Society
Source:Eurekalert

Related biology news :

1. Joint UT study: Reading food labels helps shoppers stay thinner
2. Searching for the origin of muscles
3. Study identifies how muscles are paralyzed during sleep
4. Embryonic blood vessels that make blood stem cells can also make beating heart muscles
5. Cells molecular muscles help them sense and respond to their environments
6. Brief exposure to performance-enhancing drugs may be permanently remembered by muscles
7. Artificial muscles that do the twist
8. Motion and muscles dont always work in lockstep, researchers find in surprising new study
9. Computer simulations for multiscale systems can be faster, better, more reliable
10. Bigger, better, faster
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
(Date:4/28/2016)... April 28, 2016 First quarter 2016:   ... 966% compared with the first quarter of 2015 The ... 589.1 M (loss: 18.8) and the operating margin was 40% (-13) ... Cash flow from operations was SEK 249.9 M (21.2) ... guidance is unchanged, SEK 7,000-8,500 M. The operating margin ...
(Date:4/26/2016)... Research and Markets has announced ... 2016-2020"  report to their offering.  , ,     (Logo: ... analysts forecast the global multimodal biometrics market to ... period 2016-2020.  Multimodal biometrics is being ... the healthcare, BFSI, transportation, automotive, and government for ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... , ... STACS DNA Inc., the sample tracking software company, today announced that ... joined STACS DNA as a Field Application Specialist. , “I am thrilled that ... of STACS DNA. “In further expanding our capacity as a scientific integrator, Hays brings ...
(Date:6/23/2016)... 23, 2016  Blueprint Bio, a company dedicated to ... medical community, has closed its Series A funding round, ... "We have received a commitment from Forentis ... need to meet our current goals," stated Matthew ... runway to complete validation on the current projects in ...
(Date:6/23/2016)... CA (PRWEB) , ... June 23, 2016 , ... ... software, is exhibiting at the Pennsylvania Convention Center and will showcase its product’s ... conference. ClinCapture will also be presenting a scientific poster on Disrupting Clinical Trials ...
(Date:6/23/2016)...  Amgen (NASDAQ: AMGN ) today announced ... life sciences incubator to accelerate the development of new ... at QB3@953 was created to help high-potential life science ... early stage organizations - access to laboratory infrastructure. ... two "Amgen Golden Ticket" awards, providing each winner with ...
Breaking Biology Technology: