Be Strong  Stronger Muscles  Try This Lift more weight than you
think you can. “When you use really light weights, such as one-
to two-pound weights, you have to move rather quickly to feel as
if your muscles are working,” Moore says. Better to use heavier
weights (five to 20 pounds) and contract/extend more slowly to
fully engage the muscles. And women, hear this: You will not
bulk up! Build Strength for a Healthier You By Dana Sullivan 
Published 9/3/2009  Decrease text size Increase text size  How
can building stronger muscles improve your body? Let us count
the ways. In addition to the well-known benefits of building
muscle, including trimming and tightening everything from your
biceps to your thighs, there are some you may never have heard
of. For instance, the more muscle you have, the stronger your
immune system, so you can fight off everyday bugs like colds and
the flu. With stronger muscles, you also reduce your risk of
developing life-threatening illnesses such as heart disease and
type 2 diabetes.