By Fred Tasker
26th Jan 09
Today we run marathons for fun. Are we crazy? Isn't running a marathon
a giant insult to the human body and mind?
What does it do to us?
As counterintuitive as it seems to those who don't indulge, doctors,
psychologists and runners agree that the effects of marathon running
are mainly positive. It tones our bodies, calms our minds and builds up
our all-important cardiovascular system.
"Running is good for you if you do it right," says Kevin Jacobs, Ph.D.,
exercise physiologist at University of Miami. "It builds your aerobic
capacity, so your body is better able to use oxygen, which is good for
you. It can improve blood lipids and blood glucose if they're abnormal.
You sleep better. You feel better during the day."
Dr. Kristing Karlson, of the Dartmouth-Hitchcock Sport Medicine Clinic
in New Hampshire, says "Running is good for the heart and lungs because
exercising any muscle makes it stronger," she says.
But running can become dangerous when water and salt intake are not
properly balanced. Runners who drink too little during a race can
become dehydrated, which, at the extreme, can shut down a runner's
kidneys, often with fatal results, says Karlson.
"It can also cause heat exhaustion, when your body overheats because it
can't sweat because it's lacking fluids. In this you can die because
you cook your brain."
A lesser-known but equally potent danger is hyponatremia, when runners
drink too much.
"It happens when runners drink more than they sweat during a race," she
says. Symptoms include headache, nausea, vomiting, confusion,
difficulty breathing, seizure and, rarely, death.
Women are more vulnerable than men, Karlson said, because, being slower
runners, they are more tempted to grab a bottle of water at every aid
station in the race, thus drinking too much.
Hyponatremia leads to salt depletion, which can lead to swelling in the
brain, Karlson said. "And the brain can't swell; it runs out of space."
The best way to take in the right amount of water is to weigh yourself
before and after a training run and see how much fluid you lose while
running, Karlson said. If you drink about the same amount, you should
Women also are more vulnerable to eating too little before training and
"You're rewarded because lower weight means faster times," she said.
"But you can lose your menstrual cycle, and in the long run increase
the risk of osteoporosis."
So when one sees sometimes waif-like marathon runners sweating and
straining and vomiting and collapsing and sometimes even crawling
across the finish line, the question again arises of why they would put
themselves through such misery.
Runners are eager to explain.
"You get a buzz from it, almost an out-of-body experience," says Coral
Gables, Fla., financial adviser Martin Norcini, 49, who has run 13
"You get hooked," adds Norcini's wife, Susana, 44, who's running her
first half-marathon Sunday. In training, she has developed a heel
inflammation called plantar fasciitis, which hurts when she runs.
"My doctor says I shouldn't run," she says. "But I have to run."
Martin is the family's serious runner. His best time, in a New York
City marathon, is three hours, 28 minutes. Now he has persuaded Susana
and their daughter, Isabella, 16, to join him. They train together.
They'll start together in the race, but then he will pull ahead; Susana
will stop at the end of the half marathon, and Isabella will run as far
as she can.
"I hated running before," Isabella says. "I just decided I had to do
it. Now it's fun."
Natalie Newton, a Ph.D. sports psychologist from Atlanta who
specializes in long-distance runners, puts her academic spin on it.
"Any aerobic exercise releases endorphins, which make you feel
exhilarated. A side benefit is that they help dull pain. Unfortunately,
a lot of sports figures injure themselves and don't realize it until
Endorphins, opiate-like hormones sometimes called "the body's natural
pain relievers," are released by the pituitary gland during strenuous
Another way long-distance running is different from other sports,
experts say, is that runners often peak into their 30s, ages when
football and basketball players are taking their cortisone shots and
hanging up cleats and sneakers.
"Running is more a mental challenge than a physical challenge," says
Newton, the psychologist.
"The training involved and the duration of the event takes patience,
and patience takes maturity. Younger runners want speed," says Jacobs,
For a typical beginner, Jacobs recommends starting six months before
the marathon. The routine: Warm up with jogging and jumping jacks,
start with three-mile runs at a pace of 10 minutes per mile, follow
through with post-run stretching. Aim for doing this three days a week.
Then build up in time and distance, going to five days a week, peaking
with a 20-mile run at a pace of eight-minute miles three weeks before
the marathon. At that point, taper back to about nine miles a day to
let the body recover before the 26.2-mile run.
After the marathon, the runner should rest for a week, then start back
slowly, he says.
"The recovery time is significant after a long race," he says.
Another problem for the amateur runner is that the ideal physique for
the sport is tall and thin, Jacobs says. A 350-pound football lineman
will never win a marathon, no matter how hard he trains.
"How big your muscles are is less important than how good they are at
consuming oxygen. It's part genetic, part training," he says.
And how much a runner can enjoy a grueling event like a marathon
depends on why they're running in it:
Says Mederos: "We run to exert ourselves to the max, to push our bodies
to the limit; we want the end result to be a reflection of pure guts."
Says Susana Norcini: "I enjoy the time with my family."