2014/03/d8efb_exercise_51U9U5rwtiL._SL160_

Not only is she thinner than you, her muscles work better, too: Role of muscle function in maintaining weight

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 Physiology — Endocrinology and Metabolism.

Story Source:

The above story is based on materials provided by American Physiological Society. Note: Materials may be edited for content and length.

Original story here.
Fitness News — Sciencedaily
— Courtesy “Science News Daily” (ScienceNewsDaily.com) <p>

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Comments

    • L.e. Kevin
    • March 22, 2014
    Reply

    She’s Mezzo-Soprano

    View Comment
    • cassia Roquett
    • March 22, 2014
    Reply

    I went the through the whole thing 

    View Comment
    • Av3roonyCentr@l
    • March 22, 2014
    Reply

    R.I.P. headphone users :'(

    View Comment
    • marjorie potenciano
    • March 22, 2014
    Reply

    Ppl say i have god voice but i sing wrongly

    View Comment
    • Charis SanAgustin
    • March 22, 2014
    Reply

    But my voice isn’t like that :(

    View Comment
    • Queen Heart
    • March 22, 2014
    Reply

    1:32 she dun busted my ears. to bad i was wearing headphones

    View Comment
    • Justa G
    • March 22, 2014
    Reply

    she’s good!

    View Comment
    • LADYRED MONROE
    • March 22, 2014
    Reply

    Omg this works… gotta keep practicing over and over

    View Comment
    • Rosa Milimono
    • March 22, 2014
    Reply

    goog

    View Comment
    • Alexandra PJFan
    • March 22, 2014
    Reply

    I had to stop at 1:28 :(

    View Comment
    • Leighton Alexis
    • March 22, 2014
    Reply

    Im sorry but your voice is awful vert strong but it doesnt sound good and
    thanks now i have a headache and an ear infection! Actually not joking!

    View Comment
    • Sarah Romo
    • March 22, 2014
    Reply

    My music teacher does this with “la” instead of “eeh.” Its easier but you
    need to make sure your mouth retains a round shape. I want to sing well so
    terribly cx

    View Comment
    • Merna Malik
    • March 22, 2014
    Reply

    Like if you’re homealone :D

    View Comment
    • Hannah Harlow
    • March 22, 2014
    Reply

    can we get some comments from people who have actually attempted this and
    did it successfully? that’d be great thanks

    View Comment
    • Alex Biron
    • March 22, 2014
    Reply

    It looks like they’re floating in purgatory. 

    View Comment
    • Pavan Jaiswal
    • March 22, 2014
    Reply

    yeah its simple exersise as you said..

    View Comment
    • Sturlei
    • March 22, 2014
    Reply

    piano man was like…… can i go now or what?? 2:08

    View Comment
    • Imogen Bilinsky
    • March 22, 2014
    Reply

    This exercise is literally my best friend. I would not have the voice I
    have now if I hadn’t done this now for three years. Hell, I wish I started
    earlier. THIS WORKS PEOPLE. 

    View Comment
    • alesia iliescu
    • March 22, 2014
    Reply

    I did it and I warmed up my voice and now I am ready to sing
    

    View Comment
    • corrine mischiek
    • March 22, 2014
    Reply

    Soprano? Or can you do it all? I used to sing alto when I was younger but
    would love to be able to sing again.

    View Comment
    • C. Clark
    • March 22, 2014
    Reply
    121 of 130 people found the following review helpful
    4.0 out of 5 stars
    No real “heavy”, but works well, October 20, 2009
    By 
    C. Clark (Sour Lake, TX USA) –
    (REAL NAME)
      

    Amazon Verified Purchase(What’s this?)
    This review is from: Aylio 3 Exercise Bands (Light, Medium, Heavy) and Door Anchor (Sports)
    I bought this set of bands to replace the puny resistance band included with the EA Sports Active. After trying each band in this set at shoulder level and fully stretched over the head, the difference between the light and the other bands was significant, but the difference between medium and heavy, however, was indistinguishable.

    I did some testing lifting free-weights with the bands and found each band maxed out at 15, 22, and 25 pounds for light, medium, and heavy respectively. The problem is that stretched to waste and shoulder height, the medium and heavy bands are almost identical in resistance at 12 pounds at waste and 17 pounds at shoulder height. In order to have a true heavy band, I’ll have to combine the light and the heavy for a 40 pound band.

    Pros:
    – thick material
    – 5 feet in length and will stretch 3 times as long
    – can provide a wide range of resistance from 7 to over 40 pounds with some creative thinking
    – much cheaper than free-weights

    Cons:
    – medium and heavy bands are also identical
    – requires using multiple bands for significant resistance

    0

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    • Deborah
    • March 22, 2014
    Reply
    9 of 10 people found the following review helpful
    5.0 out of 5 stars
    5 star, July 11, 2012
    By 
    Deborah

    Amazon Verified Purchase(What’s this?)
    This review is from: Aylio 3 Exercise Bands (Light, Medium, Heavy) and Door Anchor (Sports)
    Bands arrived on time. Very pleased with product. Same type of bands my husband used in therapy not to mention the money we will save by exercising at home.

    0

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