With continued exercise, the tiny blood vessels that carry fresh blood throughout your body begin to relax: resistance to the blood flow decreases, and blood pressure is lowered. This effect can last for many hours, during and after exercise. That’s why it’s especially important for the person with high blood pressure to exercise.
NOTE: If you have high blood pressure or any other medical problems, see your doctor before beginning an exercise program.
During exercise, your lungs work harder to make sure that enough oxygen gets into the blood. But it’s the muscles between the ribs (intercostal muscles) and the diaphragm that actually tighten, then relax, to expand and contract your lungs. Like any other muscles, the intercostals and the diaphragm get stronger with use. In the long run, sustained exercise increases your ability to take oxygen into your lungs. I’ve found that pulmonary (lung) functions improve in almost all patients after just four to six weeks of regular exercise.
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