When it contracts, the muscle pumps about 2 ounces (59 milliliters) of blood, and is constantly working over a lifetime.

当它收缩的时候，这些肌肉向外泵出大约2盎司(59毫升)的血液，而且在人的一生中它不断地工作。

youdao

While you may believe that continuously working out is the best way to gain muscle, exercise is only half of the equation.

你可能认为持续的锻炼是增长肌肉最好的方法，但是锻炼只是这个问题的一个方面。

youdao

The targeted muscle should be in a relaxed state, meaning the muscle should not be working to support you in any way while you are stretching it.

这些目标肌群应该处于放松的状态，这意味着当你在伸展某个肌群的时候，那部分肌肉不应有任何形式的负担。

youdao

Now,researchers with the Rehabilitation Institute of Chicago are working on another method called TMR, or targeted muscle reinnervation.

VOA: special.2009.03.10

The therapy, developed by UniQure, uses a virus to infect muscle cells with a working copy of the gene.

BBC: Gene therapy: Glybera approved by European Commission

Frequent heartburn or acid reflux are symptoms of a condition called GERD, or gastroesophageal reflux disease, which occurs when a sphincter muscle in the lower esophagus stops working properly.

WSJ: New Surgical Option for Heartburn

In addition, research suggests that consuming lean protein 15 to 20 minutes before, during and within one hour of working out may help improve muscle gain.

CNN: How should I eat to build muscle mass?