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"Sport...never sport !" Winston Churchill (mort à l'âge de 91 ans), donnant son secret de longévité en tirant sur son cigare.
7 Reasons Exercise Is Bad For Your Health
Pregnancy
While it's important that everyone aim for 30 minutes of heart-rate raising exercise a day, that doesn't mean you should be working up a sweat and working yourself into exhaustion in order to get in a good workout. Low-impact workouts--like a brisk walk or gardening--are good exercise models to live by. That run you take every morning? Not so much. It can actually do some serious harm.
How so? Well, first of all, according to a study published in Fertility and Sterility, rigorous exercise can have a negative impact on fertility for normal-weight women. Healthy-weight women who performed vigorous workouts, like fast cycling, running, and aerobics, were more likely to experience delays in their ability to conceive. Continue on for other ways your workout could be harmful.
Not So Heart-Healthy
In a British study of the long-term impact of exercise on runners and rowers, 50% of the participants showed signs of fibrosis, compared to zero "non-exercising" persons matched for age and other controls.
The study also found that years of heavy workouts, like marathons, daily running, and other strenuous exercise, weakens the heart muscles, causing erratic heart beats.
Exercise Addiction
Exercise releases endorphins, specifically dopamine, the "feel good" chemical, into the brain. Rigorous workouts increase the level of dopamine that is released. People who do intense workouts on a daily basis can become "addicted" to those increased levels of dopamine in the brain, which can be a problem when the amount of exercise a person is used to suddenly drops due to injury, illness, or other factors. Unable to function without high levels of dopamine, people have experienced depression, anxiety, and mood disorders after missing just one day of exercise.
- At least 1% of the population is affected by "exercise addiction."
- Exercise addiction has been a topic of discussion since 1976.
- Addicts exercise for mood enhancement, control, and coping.
Medical Conditions
It may surprise you to hear that exercise can actually cause diabetes. People who perform strenuous workouts like running, fast cycling, aerobics, swimming, or other sports tend to load up on complex carbohydrates--pastas, muffins, breads--after a workout in order to re-feul the body.
Carbohydrates break down into sugar in the body, so when the body is flooded with high levels of carbohydrates, it causes damage to blood vessels and nerves, can cause sugar addiction, and eventually leads to an increased risk for Type II diabetes.
- 25.8 million children and adults in the United States have diabetes.
- Diabetes is responsible for $116 million in direct costs for medical care annually.
- Roughly 1 in every 400 children and adolescents has the disease.
Joint Damage
Exercise is very, very hard on the body's joints. While the body can handle low to moderate exercise like brisk walking, golfing, or leisure cycling, strenuous workouts like running, fast cycling, aerobics, and sports cause damage to the ligaments, the soft cartilage between the joints, and other wear.
The repetitive motion of high-intensity workouts causes added, perpetual stress to the joints, causing pain, injury, and the eventual wearing down of the joints over time.
Hormonal Harm
Exercise affects the adrenal glands in your body, which regulate how your body responds to levels of physical and emotional stress. If the body is consistently exposed to high levels of physical stress, the adrenal glands may wear out and stop secreting the other hormones they regulate, such as estrogen and testosterone. What's the big deal here? According to Ben Greenfield:
- chronic fatigue
- disrupted sleep patterns
- low libido
- worn-out looking eyes
- a set and stressed jawline
- a “skinny fat” body look no matter how much exercise one does
Clock Accelerator
Yep, exercise actually makes you age faster. You already know that exposure to the sun can cause premature aging of the skin, and since most exercise is performed outside, it shouldn't surprise you that this factor correlates to premature aging. But intense workouts can also cause premature aging on the inside of the body. Because the body's functions are finite--you only get so many heart beats, turns of a joint, flexes of a muscle--the body wears down and dies when it has reached it's capacity in those areas. Repetitive, strenuous exercise speeds up the wearing down process. Your heart beats more, your joints and muscles bend, flex, and stretch more--and it all happens faster.
Because strenuous workouts inflate the amount of hormones secreted in the brain, stress the adrenal glands, wear on the body's joints, weaken the heart muscle, and can cause a host of medical issues like diabetes, delayed fertility, and body dysmorphic disorders, those rigorous workouts wear you out all over faster than the toll that everyday life would otherwise take out on your body.
Source : Chacha
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