The good news is that muscle mass can increase at any age in response to exercise. In an important study of weight lifting and older adults conducted with 100 male and female residents of a nursing home in Boston (age range: 72 to 98 years of age; average age 87), subjects lifted weights with their legs three times a week for 10 weeks. At the end of the study, there was an increase in thigh mass of 2.7%, walking speed increased 12%, and leg strength increased a whopping 113%! In a similar study of adults 65-79 years old, subjects who lifted weights three times a week for three months increased their walking endurance by 38% (from 25 minutes to 34 minutes) without appreciable increases in mass. Ida Weiss, a 91-year-old participant in the Boston study, had the following to say after the study, "It's very beneficial for me. Things that I couldn't do when I came here, I can do now. I didn't think that I was going to live anymore, but I feel different now."
Love treadmills? One con, Smith notes, is that a motorized treadmill can do too much of the work for you. You need to elevate the walking surface a few degrees just to match the effort of walking on flat ground. Your fix: Once you can walk on the treadmill comfortably, don’t be afraid to bump up the incline or intensity. Learn how in our beginner’s guide to the treadmill.
The Centers for Disease Control and Prevention suggest this amount of time for generally fit Americans aged 65 and older. Even though this sounds like a lot, the good news is that you can break it down into 10- or 15-minute chunks of exercise two or more times a day. Here’s an example of what a week might look like, along with suggestions for some exercises you can do to get started: