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How often should I train? How hard? For how long?
-Most experts believe that 3-5 times per week for a duration of 20-60 minutes at 60-90% of age specific maximal heart rate or 50-85% of VO2max (h
eart rate reserve).
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To strengthen your heart, you should do aerobic exercise intensely enough to reach your target heart rate. This is 60-80 percent of your maximum heart rate ? which is 220 minus your age. (Example: if
you're 50 years old, your maximum heart rate is 170; your target heart rate is 102-136.)
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Benefits of Aerobic Exercise
-Increased maximal oxygen consumption (VO2max)
-Improvement in cardivascular/cardiorespiratory function (heart and lungs)
-Increased maximal cardiac output (amo
unt of blood pumped every minute)
-Increased maximal stroke volume (amount of blood pumped with each beat)
-Increased blood volume and ability to carry oxygen
-Reduced workload on the hear
t (myocardial oxygen consumption) for any given submaximal exercise intensity
-Increased blood supply to muscles and ability to use oxygen
-Lower heart rate and blood pressure at any level of
submaximal exercise
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Aerobic Exercise Guidelines:
Mode:
Type of exercise - what is aerobic exercise?
Frequency:
3-5 days per week
Duration:
20 to 60 minutes of continuous aerobic activity
Intens
ity:
50 - 85% of maximal aerobic capacity (VO2 max), or
50-85% of Heart Rate Reserve, or
60-90% of Maximal Heart Rate
Low Intensity: 35-60% of Heart Rate Max or 50-60% of Heart Rate Re
serve
Moderate Intensity: 60-80% of Heart Rate Max or 60-70% of Heart Rate Reserve
High Intensity: 80-90% of Heart Rate Max or 70-85% of Heart Rate Reserve
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There are several types of aerobic exercise that are gentle on the back and, when done on a regular basis, highly effective in providing conditioning.
-Walking for exercise. In general, walking for
exercise is very gentle on the back, and walking two to three miles three times per week is very helpful for patients.
-Stationary bicycling for exercise. If walking is painful, stationary bicycli
ng is also effective and may be less stressful on the back.
-Water therapy for exercise. Doing exercise in the water provides for effective conditioning while minimizing stress on the back
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Reconditioning through low-impact aerobic exercise is very useful for both rehabilitation and maintenance of the lower back. Patients who regularly undergo aerobic exercise will have fewer episodes of
low back pain, and will experience less pain when an episode occurs. Well-conditioned patients are also more likely to stay functional (e.g. continue working and carry on with recreational activities
), whereas those patients with chronic low back pain who choose not to work on low-impact aerobic exercise should expect to experience the gradual loss of functional capabilities.
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