Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Adam Aaronson’s tough themeless puzzle will get your head spinning. By Caitlin Lovinger SATURDAY PUZZLE — Adam Aaronson is a steady contributor to The New York Times’s daily crosswords and has ...

Simply sign up to the Chinese economy myFT Digest -- delivered directly to your inbox. China’s factory activity returned to growth in December, snapping a record eight-month contraction as Beijing ...

From the Cardiology Branch. National Heart Institute (requests for reprints should be addressed to Dr. Braunwald at the National Heart Institute, Bethesda. Maryland 20014). Eugene Braunwald, M.D.

Background: Lamin A/C (LMNA) is a nuclear intermediate filament protein that is expressed ubiquitously. LMNA mutations account for 6% of dilated cardiomyopathy, and patients affected by these ...

From Santiago Ramón y Cajal’s hand came branches and whorls, spines and webs. Now-famous drawings by the neuroanatomist in the late 19th and early 20th centuries showed, for the first time, the ...

If you tend to breeze through the "easy" part of an exercise—like lowering into a squat or letting your dumbbells drop after a curl—you might be missing a major opportunity to build strength. That ...

Abstract: A mathematical model for the excitation-contraction mechanism (E-C coupling) in cardiac cells has been formulated, based on the works of Tang and Othmer (1994), Luo and Rudy (1994), Jafri ...

Contractions are when the muscles of your uterus tighten and relax to get ready for childbirth. These muscles help push your baby down the birth canal. Once you reach week 37 of your pregnancy, it ...

As major companies cut costs and production continues to lag, professionals who have already achieved success in entertainment are applying for jobs in project management, marketing and even at Whole ...

The ISM monthly survey of purchasing managers showed that just 47.2% reported expansion in August, above the July reading but below the consensus forecast. Another weak economic reading raises the ...

Using powerful new visualization technologies, researchers have captured the first 3-D images of the structure of a key muscle receptor, providing new insights on how muscles develop across the animal ...