To study the effects of physical forces on cell growth and differentiation, researchers must stretch, strain, compress, shear, pull, or apply pressure to tissue culture cells. Numerous procedures have ...

If you're looking for a way to improve your flexibility, reduce stress, avoid injury and extend your range of motion to help boost your exercise performance, take a tip from Mother Nature: Stretch.

When talking specifics, stretching terminology can get confusing. “Passive” and “static” generally refer to the same old-school method of relaxing into a stretch and holding it for 30 to 60 seconds.

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Flexibility is an ...