Regular
physical activity has many known health benefits, one of which is that it might
help you live longer. But what’s still being determined are the types and
duration of exercise that offer the most protection.
اضافة اعلان
In a new study
published in The British Journal of Sports Medicine, researchers found that
although doing either aerobic exercise or strength training was associated with
a lower risk of dying during the study’s time frame, regularly doing both — one
to three hours a week of aerobic exercise and one to two weekly
strength-training sessions — was associated with an even lower mortality risk.
Switching from a
sedentary lifestyle to a workout schedule is comparable to “smoking versus not
smoking,” said Carver Coleman, a data scientist and one of the authors of the
study.
The paper is the
latest evidence in a trend showing the importance of strength training in
longevity and overall health.
“The study is
exciting because it does support having a mix of both aerobic and strength
training,” said Dr Kenneth Koncilja, a gerontologist at the Cleveland Clinic,
who was not involved in the study. “That is definitely something I talk with my
patients about all the time.”
Cardio plus strength training offers the most
protection.
For the study, researchers used National Health Interview Survey data,
which followed 416,420 American adults recruited between 1997 and 2014.
Participants filled out questionnaires detailing the types of physical activity
they had been doing, which included specifying how much moderate or vigorous
exercise, along with how many sessions of muscle-strengthening exercises they
did in a week.
After adjusting for
factors such as age, gender, income, education, marital status, and whether
they had chronic conditions, such as diabetes, heart disease, or cancer, researchers
found that people who engaged in one hour of moderate to vigorous aerobic
activity a week had a 15 percent lower mortality risk. Mortality risk was 27
percent lower for those who did three hours a week.
But those who also
took part in one to two strength-training sessions per week had an even lower
mortality risk — 40 percent lower than those who did not exercise at all. This
was roughly the difference between a nonsmoker and someone with a
half-a-pack-a-day habit.
The link between strength training and longevity is
not well understood
Experts say it has been difficult to study longevity and strength training
because so few people do it regularly. Even in the recent study, just 24
percent of participants did regular strength training (as opposed to 63 percent
who said they did aerobic workouts). “Even with huge cohorts like we had here,
the numbers are still relatively small,” said Arden Pope, an economist at
Brigham Young University and one of the authors of the paper.
However, research
is starting to catch up. In a recent meta-analysis, published in February, also
in The British Journal of Sports Medicine, researchers were able to quantify
the effect of strength training on longevity outside of aerobic activity.
Switching from a sedentary lifestyle to a workout schedule is comparable to “smoking versus not smoking.”
They found that the
largest reduction was associated with 30 to 60 minutes of strength training a
week, with a 10 percent to 20 percent drop in the risk of mortality,
cardiovascular disease and cancer. However, as Haruki Momma, a sports scientist
at Tohoku University and one of the authors of the study, points out, there
needs to be more research done to find the optimal amount of strength training.
Regular strength
training is important for healthy aging
Even though more research is needed, experts generally agree that regular
strength training can have important benefits for healthy aging, including
maintaining a high quality of life.
“You will function
at a much higher level, for longer, if you have good muscle strength,” said Dr
Bruce Moseley, an orthopedic surgeon at Baylor College of Medicine.
Muscle strength is
required for a number of daily activities, such as getting out of a chair,
opening a jar of pickles, carrying groceries into the house, or doing yardwork.
However, “we progressively lose muscle mass as we age,” said Monica Ciolino, a
physical therapist at Washington University at St. Louis.
This muscle loss
usually starts in a person’s 30s and progresses with age. However, “we can
absolutely fend off the negative effects” with regular strength training,
Ciolino said. And it is never too late to start. Research shows even
septuagenarians with mobility issues can benefit from a regular
strength-training program.
Moseley suggests
aiming for a consistent strength-training schedule and easing into it to avoid
overuse injuries.
“Keep it at a light
and easy level at first,” he said. “Once your body starts getting adjusted,
then you can start increasing.”
If you are still
uncertain about certain exercises, he recommends seeking out expert advice
through an exercise class or consulting with a personal trainer. The important
thing, he said, is to get started and to make it a habit. Not only can this
help you live longer, it will improve your quality of life.
“When I ask people,
‘What does successful aging mean to you?,’ people say they want to be
independent, they want to maintain their function and quality of life, they
want to do the things that they want to do,” Koncilja said. “It’s not
necessarily just living as long as possible.”
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