Abuja - A 30-minute walk every day can do more for your long-term health
than all the efforts of a dozen doctors and their medication.
Not
only does exercise improve your health, even if you have already been
diagnosed with something, but it can go a long way to prevent the onset
of several life-threatening conditions, such as heart disease, diabetes
and cancer.
And exercise can make you look great – younger, fitter and thinner. Who needs any more convincing?
We have scrutinised the medical journals. Here's a summary of the proven health benefits of exercise:
1. It's good for your heart
"Even
a moderate amount of exercise helps your heart," says Dr William Kraus,
associate professor of medicine at Duke University Medical Centre, in
an article published in The New England Journal of Medicine. "Some
exercise is better than none and more is better than less."
Exercise
reduces LDL cholesterol, the kind that clogs arteries. It also reduces
your blood pressure, relieving stress on your heart; improves your
insulin sensitivity; improves heart muscle function; and blood flow and
diminishes the chances of developing blood clots. These findings have
been corroborated by a host of studies over the years.
2. Exercise promotes weight loss
Research
has shown that to manage weight, you should exercise energetically for
at least 30 minutes a day. You can also do an hour of intensive exercise
every second day if this fits into your schedule more easily. Be
consistent and be regular. Do those one-hour exercise sessions three to
four times every week, not just one week a month, and you will achieve
the result you desire - to lose weight and keep it off, says Dr Ingrid
van Heerden, registered dietician.
3. Exercise prevents osteoporosis
Exercise,
together with a healthy calcium intake, builds strong bones.
Weight-bearing exercises, like running, walking and weight-lifting, help
lower your odds of getting osteoporosis as you grow older, according to
experts.
Ideally, you should start when you're young, but it's
never too late to pick up the habit. Even a brisk walk can help, say
metabolic disease specialists.
4. Exercise lowers high blood pressure
Exercise
is good for your blood pressure - no matter your age, weight, race or
gender. And it really doesn't matter whether you get exercise from a
brisk walk, a fast run or a few laps in the pool; the results are
equally good.
The studies on which these findings were based used
"aerobic" exercise - activities that increase heart rate and improve
the body's ability to use oxygen. Most of the studies involved
participating in one or more aerobic activity for 20 - 30 minutes per
session, several times a week.
On average, exercise helped study
participants reduce systolic (top number) pressure by nearly 4 mm Hg,
and diastolic (bottom number) pressure by slightly more than 2.5 mm Hg.
But experts caution that those with extremely high blood pressure should
not rely on exercise alone to control hypertension.
5. Exercise is an excellent de-stressor
It's general knowledge: exercise counters stress and depression. But exactly how and why does this work?
Exercise
acts as a temporary diversion to daily stresses and it improves
self-esteem. Increased core temperature during exercise may lead to
reduced muscle tension and favourable alterations in brain
neurotransmitters. Mood improvements may also occur due to the increased
secretion of endogenous (internal) opiates, e.g. endorphins.
Psychological changes may occur because of changes in norepinephrine,
dopamine and serotonin, all hormones which can affect mood and anxiety
levels.
6. Exercise prevents colds
One doesn't
automatically associate regular exercise with a reduction in the number
of colds people get. But researchers from the University of Carolina
found that people who exercised regularly were 23% less likely to get
colds than those who exercised less. And if those who exercised got
colds, the symptoms disappeared more quickly than in the study
participants who did little exercise.
Health experts believe that
exercise spikes the immune system for a few hours each day, helping to
ward off colds. Thirty minutes of brisk walking is enough to make you
reap the benefits of exercise.
7. Exercise reduces the severity of asthma
Many
people who suffer from exercise-induced asthma, understandably try to
avoid exercise. But sports medicine specialists say it's possible for
asthmatics to continue exercising if they use preventive medications
wisely and avoid certain triggers that exacerbate attacks.
Exercise-induced asthma can be made worse by cold, dry air or air
containing high levels of pollen or pollutants. The extra effort made to
stay fit pays off in fewer or milder asthma attacks overall and a need
for less medication.
Experts recommend swimming as one of the best exercises for people with asthma.
8. Exercise reduces diabetic complications
Lifestyle
factors have a huge impact on certain conditions – and diabetes is one
of them. Exercise can help to reduce your insulin requirements, lower
your cholesterol levels and high blood pressure, and in the long term
can reduce the development of heart disease and stroke. This is
important because diabetics have a higher risk of developing heart and
circulatory problems. Exercise can also promote weight loss, improve
circulation and reduce stress levels (raising your glucose level).
9. Exercise promotes a healthy pregnancy
Although
exercise might be risky in some cases, the benefits of exercising
during pregnancy generally far outweigh the risks and some women can
even exercise up until the third trimester. Relaxation exercises, Kegel
exercise that strengthen the pelvic muscles and back exercises are all
important for pregnant women.
10. Exercise plays a role in preventing cancer
At
least 35% of all cancer deaths may be related to overweight and lack of
activity, the Seattle Cancer Research Centre has found. Exercise is
believed to speed the passage of food through the colon, thereby
reducing the amount of time that any toxins are in contact with the
body. Overweight people also tend to have more insulin, which promotes
the growth of tumours. For women, exercise reduces the level of
oestrogen, a hormone linked to breast cancer.
11. Exercise has anti-ageing effects
Exercise enhances blood flow to the brain, possibly reducing risk of stroke. It also improves reasoning and memory.
Regular
exercise arouses the brain and slows down degeneration of the central
nervous system, which leads to slower reaction times and poorer
coordination.
Exercise also increases strength and size of
muscles and improves lung function. Regular exercise can reduce body fat
and lower the risk of chronic lifestyle diseases in the elderly. Recent
literature suggests that the greatest threat to health is not the aging
process itself, but rather inactivity.
12. Exercise promotes brain health
If
you thought exercising your brain meant only doing a few crossword
puzzles or learning a language, you may be wrong – rather put on your
walking shoes and get moving. This was the finding of researchers from
the University of Illinois.
Their study found that the brain responses in active seniors were comparable to those of young adults.
It
is thought that exercise increases the flow of blood to the brain, just
as it improves circulation to the heart and the rest of the body.
Activity also stimulates the growth of nerve cells in the part of the
brain involved in memory.
13. Exercise is great for your sex life
The medical research points towards it: the fitter you are, the better your sex life is.
The
reason seems to be two-fold: psychologically you feel better about
yourself and more inclined towards sex, and physically, being fit
improves libido, blood circulation and sexual functioning.
It has
been said before that the brain may be the most important sexual organ.
This is because stressed, anxious and depressed people are usually
unable to enjoy a healthy sex life. Additionally, people with a bad body
image do not feel good about their bodies and often avoid sex or are
unable to truly enjoy it.
According to the American Council on
Exercise (ACE), being physically active can be “a natural Viagra boost”.
“Men and women who exercise regularly are going to have increased
levels of desire. They’re going to have enhanced confidence, enhanced
ability to achieve orgasm and greater sexual satisfaction,” says Cedric
Bryant, the council’s chief exercise physiologist.
14. Exercise improves sleeping patterns
Relaxation
exercises will help you to ease tension and relieve headaches,
backaches and insomnia. Exercise releases the body's own painkillers,
called endorphins, into your system. It also helps you to gain a sense
of emotional wellbeing and a feeling of being more in control.
Exercise
during the day promotes the onset and quality of sleep, according to
the South African Memory Resource Centre. But you need to exercise at
the right time: the ideal time for exercise is in the morning.
Exercising late in the day can contribute to sleeplessness, because
exercise causes an increase in your body's energy.
15. Exercise combats impotence
If
you stop and think about it, it makes sense - increased circulation as a
result of exercise should result in lower levels of impotence, as
getting an erection is dependent on the efficiency of blood circulating
to the penis.
"Losing weight, stopping smoking and doing more
exercise are associated with better sexual health," says Dr Andrew
McCullough, director of Male Sexual Health, Fertility and Microsurgery
at New York University Medical Center in New York City. "We talk so much
about treating, treating, treating. Here we're beginning to see an
increasing body of evidence that we can modify the appearance of this by
changing lifestyle."
16. Exercise helps prevent stroke
Need another reason to make good on that long overdue promise to get more exercise? It can dramatically cut your risk of stroke.
"Highly
active" people had a 27 percent lower risk of having a stroke or dying
if they had one, compared with sedentary folks. And people who were
"moderately active" had a 20 percent lower risk.
These findings
are based on a review of 23 international studies that appear in the
October issue of the journal Stroke, the Associated Press reports.
Jogging
15 to 20 minutes a day most days would qualify as highly active. Brisk
walks of 30 minutes a day on most days would qualify as moderate
activity, the AP says.
17. Exercise is good for mind and soul
In
a synopsis on “Exercise, Fitness and Mental Health” (1990), sports
psychologist D.R. Brown summarised the possible beneficial effects that
exercise has on mental health. These include the following:
- Exercise may act as a temporary diversion to daily stresses.
- Exercise provides an opportunity for social interaction that may otherwise be lacking in an individual’s life.
-
Exercise provides an opportunity for self-mastery. Increasing fitness
or improving body composition and other health parameters may improve an
individual’s self-esteem.
- Increased core temperature during exercise may lead to reduced muscle tension or alterations to brain neurotransmitters.
- Mood improvements may occur due to the increased secretion of endogenous (internal) opiates e.g. endorphins
-
Psychological changes may occur due to alterations in norepinephrine,
dopamine and serotonin, all hormones which can affect mood and anxiety
level.
18. Exercise improves oxygen and nutrient supply to all cells in your body.
An
American study indicates that ‘80-plus-ers’ can dramatically improve
their health by exercising a few times a week. If this is true for
elderly people, it certainly is for the younger set as well.
Exercise
improves the body's utilisation of oxygen, and lowers systolic blood
pressure (high pressure is a dangerous condition common in elderly
people).
Positive results were obtained from the 22 elderly
people (80 years and older) who took part in the study at the Veterans
Affairs Ann Arbor Healthcare System in Michigan.
19. Exercise allows you to improve muscle strength, joint structure and joint function
Strengthening exercises increase not only muscle strength and mass, but also bone strength, and the body's metabolism.
A
certain level of muscle strength is needed to function every day and do
things such as walking and climbing stairs. Strengthening exercises
increase this muscle strength by putting more strain on a muscle than it
is normally accustomed to receiving. This increased load stimulates the
growth of proteins inside each muscle cell that allow the muscle as a
whole to contract.
Exercise can promote joint health for
everyone, but particularly for people who suffer from arthritis.
Arthritis is a general term for over 100 different conditions that cause
pain, stiffness and often inflammation in one or more joints. Exercise
can reduce some arthritis symptoms and improve joint mobility and
strength.
Osteoarthritis is the most common form of arthritis.
Normally, the two bones of a joint are cushioned with a strong flexible
tissue called cartilage. In osteoarthritis, the cartilage deteriorates,
causing pain and stiffness.
Cartilage doesn't have a blood
supply; it relies on synovial fluid moving in and out of the joint to
nourish it and take away waste products. Exercise helps this process.
20. Exercise helps to manage arthritis
Regular,
intensive exercise for patients with rheumatoid arthritis builds muscle
strength and aerobic capacity, improves the ability to do daily tasks
and fosters a sense of well-being.
That's the conclusion of a
study by Dutch researchers who tracked 300 people with rheumatoid
arthritis (RA) for two years. About half the patients participated in a
one-hour exercise regimen twice weekly; the rest received traditional
treatment, including physical therapy, if prescribed by their
physicians.
The findings, appearing in journal Arthritis &
Rheumatism, suggest high-intensity exercise programmes can benefit many
RA patients, says researcher Dr Thea Vlieland of Leiden University
Medical Centre.
The positive effects on muscle strength and
aerobic capacity could be translated into an improvement in the
activities of daily living, and this is what really makes a difference
in your life, Vlieland says.
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