Weight training by older people may build not only strength and muscle mass but also motivation and confidence, potentially spurring them to continue exercising, according to an interesting new study of the emotional impacts of lifting weights.
The findings intimate that people worried that they might be too old or inept to start resistance training should perhaps try it, to see how their bodies and minds respond.
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We already have plenty of evidence, of course, that weight training can help us to age well. By our early 40s, most of us are losing muscle mass, at a rate of about 5 percent a decade, with the decline often precipitating a long slide toward frailty and dependence.
But older people who lift weights can slow or reverse that descent, studies show. In multiple experiments, older people who start to lift weights typically gain muscle mass and strength, as well as better mobility, mental sharpness and metabolic health.
But lifting helps only those who try it, and statistics indicate that barely 17 percent of older Americans regularly lift weights.
So, as part of a larger study of weight training and the elderly, scientists at the University of Jyvaskyla in Finland recently decided to see if they could discover how weight training changes the minds as well as the musculature of people who had not done it before.
To start, they turned to 81 older men and women who were part of their health database and who had agreed to begin resistance training. These volunteers were all between the ages of 65 and 75 and, like many Finns, healthy and physically active. But they did not lift weights.
For the full study, they began a twice-weekly program of supervised, full-body resistance training at the university to familiarize participants with proper technique and build a base of strength.
After three months, the group was randomly assigned to continue training once, twice or three times a week, while a separate, untrained group served as controls. Periodically, the researchers checked the volunteers’ strength, fitness and metabolic health, and also their attitudes about the workouts, including whether they found them daunting or inviting and how difficult it was for the volunteers to find the time and resolve to show up.
This routine lasted for six months, by which time the people lifting weights had almost all gained strength and improved various markers of their health, even if they had lifted only once a week.
But then, after the months of supervised lifting, the exercisers abruptly were on their own. The researchers explained that they could no longer have access to the university facilities and provided them with information about low-cost, suitable gyms in the area. But any subsequent training would be at their own volition.
The researchers waited six months and then contacted the volunteers to see who was still lifting and how often. They repeated those interviews after an additional six months.
They found, to their surprise, that a year after the formal study had ended, almost half of the volunteers still were lifting weights at least once a week.
“We had estimated a rate of 30 percent,” says Tiia Kekalainen, a project researcher at the University of Jyvaskyla who led the psychological study with the senior author, Simon Walker, and others.
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Also surprising, the researchers discovered little direct correlation between muscle and motivation. The people who had gained the most strength or muscle mass during the study were not necessarily those most likely to stick to the training.
Instead, it was those who had come to feel most competent in the gym. If someone’s self-efficacy, which is a measure of confidence, had risen substantially during the study, he or she usually kept lifting.
In effect, Ms. Kekalainen says, people who discovered that they enjoyed and felt capable of completing a weight-training session subsequently sought out and joined a new gym and showed up for workouts, despite no longer receiving nudges from the researchers or encouragement and companionship from their fellow volunteers.
“They found out that resistance training is their cup of tea,” Ms. Kekalainen says.
Most of them also told the researchers that weight training had provided them with renewed confidence in their physical abilities beyond the gym.
“They could do things that they thought they could not do before,” she says.