20 Hottest Fitness Trends Slideshow Pictures How to Build a Better Butt Slideshow Pictures 7 Most Effective Exercises Slideshow Pictures

Medical Author:

Richard Weil, MEd, CDE

Richard Weil, MEd, CDE

Richard Weil, MEd, CDE, is an exercise physiologist and Certified Diabetes Educator, and is director of the New York Obesity Research Center Weight Loss Program at St. Luke's Roosevelt Hospital Center in

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Medical Editor:

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

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Why Resistance Training?

The benefits of resistance exercise are well documented, and ongoing research continues to prove that it's an important activity for Americans to be engaged in. Long ago in hunter-gatherer societies, humans' muscles got a workout by building shelter, hunting, farming, and all the other manual chores necessary to live. Today, however, we have engineered inactivity into our lives with labor-saving devices to the extent that our muscles rarely need to be pushed very hard. We don't rake leaves or cut grass or shovel snow by hand; we don't climb stairs or even walk in airports (people movers do it for us!); we don't wash our clothes or our dishes or even push a vacuum by hand (Have you seen the robotic vacuum Roomba?), and we spend more and more time in front of our computers and televisions than we do outdoors raking leaves, playing touch football, baseball, soccer, hiking, or participating in any other recreational activities. Research shows that physical inactivity is the second leading preventable cause of death in the United States, and it's literally killing us.