Mindy wants to lose weight and the fact that her parents engage in regular exercise is a predisposing factor.
When losing weight, additional physical activity will increase the amount of calories your body uses for energy or “burns off.” The burning of calories through physical activity, combined with reducing the amount of calories you eat, creates a “calorie deficit” that ends up in weight loss.
The ACSM recommends a minimum of half-hour of moderate-intensity exercise, five days per week. a pair of If you are simply beginning out, you'll be able to begin with less frequency. The secret is consistency—even if that involves twenty minutes on three days per week. In short, some exercise is healthier than no exercise.
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Well we are now able to explore places we are not able to go with technology
and also it has better prepared us for the future such as weather reports it is also one of the quickest ways of long range communication
One positive example of health fitness advertisements would be advertisements that get you to come to the gym to work out.
A negative example would be dieting pills that make it seem like you don't have to put in any work to lose weight healthily.
Breathing In (Inhalation)
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
As your lungs expand, air is sucked in through your nose or mouth. The air travels down your windpipe and into your lungs. After passing through your bronchial tubes, the air finally reaches and enters the alveoli (air sacs).
Through the very thin walls of the alveoli, oxygen from the air passes to the surrounding capillaries (blood vessels). A red blood cell protein called hemoglobin (HEE-muh-glow-bin) helps move oxygen from the air sacs to the blood.
At the same time, carbon dioxide moves from the capillaries into the air sacs. The gas has traveled in the bloodstream from the right side of the heart through the pulmonary artery.
Oxygen-rich blood from the lungs is carried through a network of capillaries to the pulmonary vein. This vein delivers the oxygen-rich blood to the left side of the heart. The left side of the heart pumps the blood to the rest of the body. There, the oxygen in the blood moves from blood vessels into surrounding tissues.
(For more information on blood flow, go to the Health Topics How the Heart Works article.)
Breathing Out (Exhalation)
When you breathe out, or exhale, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity.
As the space in the chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out of your nose or mouth.
Breathing out requires no effort from your body unless you have a lung disease or are doing physical activity. When you're physically active, your abdominal muscles contract and push your diaphragm against your lungs even more than usual. This rapidly pushes air out of your lungs.
The animation below shows how the lungs work. Click the "start" button to play the animation. Written and spoken explanations are provided with each frame. Use the buttons in the lower right corner to pause, restart, or replay the animation, or use the scroll bar below the buttons to move through the frames.
Because the kidneys cant get rid of all toxins in the body.
