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 provider of ... MegaMatcher Automated Biometric Identification System (ABIS) , a ... projects. MegaMatcher ABIS can process multiple complex biometric ... combination of fingerprint, face or iris biometrics. It ... and MegaMatcher Accelerator , which have ...
(Date:4/26/2016)... -- Research and Markets has announced the ...  report to their offering.  , ,     (Logo: ... forecast the global multimodal biometrics market to grow ... 2016-2020.  Multimodal biometrics is being implemented ... healthcare, BFSI, transportation, automotive, and government for controlling ...
(Date:4/14/2016)... AVIV, Israel , April 14, 2016 ... Behavioral Authentication and Malware Detection, today announced the appointment ... already assumed the new role. Goldwerger,s leadership ... BioCatch, on the heels of the deployment of its ... addition, BioCatch,s behavioral biometric technology, which discerns unique cognitive ...
Breaking Biology News(10 mins):
(Date:5/24/2016)... AVIV, Israel , May 24, 2016   MedyMatch ... providing physicians with artificial intelligence, real-time decision support tools in ... to present at the 2016 Israeli Advanced Technology Industries (IATI) ... of Israel,s 15th National Life Sciences ... 26th at the David Intercontinental Hotel in Tel ...
(Date:5/24/2016)... ... 24, 2016 , ... Media Cybernetics, global image analysis leader, ... branding reflects a results-driven revitalization for a company with a renewed focus on ... a crisp, refreshed logo and a new web presence. , “I believe that ...
(Date:5/23/2016)... ... May 23, 2016 , ... PrecisionAg® Media has released ... and Beyond. The paper outlines the key trends that are creating both opportunities ... witnessed a lot of highs and lows as the precision agriculture market has ...
(Date:5/23/2016)... May 23, 2016 Oxitec CEO ... at 10:15 a.m. ET before the United States House ... engineered mosquitos can play in controlling the spread of the ... Zika virus.      (Logo: http://photos.prnewswire.com/prnh/20150630/227348 ) ... with a self-limiting gene. Trials in Brazil ...
Breaking Biology Technology: