Exercise science research has long stated that we tend to lose roughly 0.5 lbs. of muscle each year starting around the third to fourth decade of life depending on activity level. This does not sound like much but after a decade your down 5 pounds of metabolically active muscle tissue. In order to prevent this from happening you NEED to perform regular strength training sessions 2-3 times each week.
New research from the University of Michigan Medical School has shown that through regular strength training over a five month period subjects were able to add 2.5 lbs. of muscle mass. The study looked at 39 different strength training studies than included more than 1,300 individuals who were age 50 or older.
Let me ask you a question. If you knew you were losing muscle mass as you age and that this negtively effected your balance and overall functionality and that a magic pill - strength training - would stop it from happening...would you try it? Source: NPR Health, Seniors Can Still Bulk Up On Muscle By Pressing Iron, by Patti Neighmond