Health

The surprising benefits of weight training

(HealthDay)—The most common misconception about weight training is that it adds bulky muscle mass, a fear of some women. While elite male lifters can—and want to—get very developed, for most people the result is simply ...

Diseases, Conditions, Syndromes

Frailty assessment may aid liver transplant evaluation

(HealthDay)—A frailty assessment as part of liver transplant evaluation may help identify transplant candidates at higher risk for death, according to a study published online Sept. 11 in JAMA Surgery.

Gerontology & Geriatrics

It's never too late to start exercising, new study shows

Older people who have never taken part in sustained exercise programmes have the same ability to build muscle mass as highly trained master athletes of a similar age, according to new research at the University of Birmingham.

Health

Do more to strengthen your core

(HealthDay)—Developing core strength is essential for fitness and overall health, but it doesn't have to be a drudge. If you're ready to go beyond crunches—or never liked them to begin with!—consider these moves that ...

Health

Vitamin D is not linked to low blood pressure in older adults

Researchers from The Irish Longitudinal Study on Ageing (TILDA) at Trinity College have shown in the largest study to-date that vitamin D is not associated with low blood pressure on standing (orthostatic hypotension) in ...

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Muscle

Muscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.

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