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- From: cpk@cray.com (Chris Kruell)
- Newsgroups: rec.running
- Subject: Re: Do we age in spurts?
- Message-ID: <cpk-291292093705@harrier.cray.com>
- Date: 29 Dec 92 15:41:17 GMT
- References: <1992Dec24.123801.8576@newstand.syr.edu>
- Followup-To: rec.running
- Organization: Cray Research, Inc.
- Lines: 103
- Nntp-Posting-Host: harrier.cray.com
-
- Tangentially related to this, here's an article that appeared in the
- 28 Dec 92 Minneapolis Star-Tribune; it apparently originally appeared
- in the LA Times.
-
- ---
-
- Study wonders how old and fit we can become if we train as athletes
-
- By Shari Roan
- Los Angeles Times
-
- As both a competitive runner in his 70s and as the president of a
- charity, Ed Stotsenberg seized the moment when University of Southern
- California gerontology researchers came to him for a funding grant.
-
- "I said, 'Why donUt you study old runners like me?' recalls Stotsenberg,
- 78, president of the Mary Pickford Foundation, a major donor to
- gerontological research.
-
- "Find out what a heathy person is supposed to look like at this age,"
- exhorted Stotsenberg, who told the researchers that he still felt "just
- as good as I did at 25."
-
- His curiosity has translated into an intriguing long-term study on how
- aging affects athletes.
-
- The study, which began in 1987, features almost 200 masters athletes --
- people 40 and older who compete in at least one sanctioned event each
- year. If the study unfolds as planned, the youngest of these athletes
- will be studied for at least 20 years.
-
- Researchers hope that they can describe how those people who attempt to
- stay fit can forestall some of the consequences of aging.
-
- "We want to know what the normal aging rate is for active people," says
- USC professor Robert Wiswell, director of the study. "We know lots more
- about younger athletes and older inactive people than we do about older
- active people."
-
- In other words, just how old and how fit can we become?
-
- The study has already dropped some tantalizing hints: Speed and muscle
- strength may endure longer than assumed. Athletic performance may not
- decline significantly until age 60.
-
- "We have no evidence that age sets a limit on fitness," Wiswell says.
- "Are these people (in the study) the exception or are people who are
- inactive capable of doing this but are just not motivated?"
-
- "This is an area of research that is only now beginning to develop,"
- said Dr. James Cooper, a geriatrician at the National Institute on
- Aging. "We probably know less about the serious athlete, the marathon
- runner or the person who maintains a high level of fitness" than about
- older inactive people.
-
- What research does show, said Cooper, is that 40 percent of people older
- than 65 are sedentary. Those 60 percent who do some exercise have a
- lower death rate, have fewer falls and injuries, and are more mobile
- than their peers.
-
- "There is nothing that can retard the aging process as much as
- exercise," Cooper says.
-
- Wiswell hopes that the study will put some muscles behind the
- governmentUs highly publicized Healthy People 2000 program, which
- advocates lifelong exercise to prevent disease and to promote mobility
- and independence well into old age.
-
- It's a standard belief in physiology that after ages 22 to 25, people
- begin losing function in most of the organ systems at a rate of about 1
- percent per year, or about 10 percent per decade, Wiswell says. Other
- research indicates that men typically lose about one-half pound of lean
- tissue but gain one pound of weight per year after 35. Women gain a
- half-pound of weight per year and lose about one-third of a pound of
- lean issue.
-
- But, so far, Wiswell's subjects appear to be altering this picture of
- decline. Some subjects who have been tested three times have shown no
- loss of aerobic capacity over five years, he says, indicating the lungs
- and heart may not be losing function as quickly as people thought they
- might.
-
- For example, one man who ran the 100-yard dash in 10 seconds at age 20
- now clocks 12 seconds for the same distance at age 60.
-
- "That's a 20 percent loss in time, but it's also less than the 1 percent
- per year you would expect," Wiswell says.
-
- Wiswell and his team of student assistants are also interested in how
- exercise might affect a woman's risk of the bone-thinning disease
- osteoporosis.
-
- Studies in younger women indicate that running does not prvent bone
- loss. And, picking up an X-ray of one of the female runners in his
- study, Wiswell points to a spine almost devoid of the calcium deposits
- that keep bones strong. But this woman has no symptoms of osteoporosis.
-
- Wiswell says his study may show that maintaining muscle strength may be
- one way to counter the effects of aging bones.
-
- ---
- Chris Kruell
- cpk@cray.com
-