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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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How aerobics improve your health
Aerobic exercises use continuous, rhythmic activity of large muscles in the legs and buttocks to strengthen your heart and lungs (cardiovascular system). When you
exercise, the muscles demand more oxygen-rich blood and give off more carbon dioxide and other waste. This makes your heart beat faster to keep up.
When you follow a program of regular aerobic exe
rcise, over time your heart grows stronger and can meet the muscles' demands without as much effort. Both men and women can benefit from cardiovascular fitness. Check with your doctor first if you hav
e a chronic condition or are overweight, a smoker or middle aged or older and have never exercised.
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What factors affect aerobic training?
-Frequency, duration and intensity. Frequency refers to how often you perform aerobic activity, duration refers to the time spent at each session, and intens
ity refers to the percentage of your maximum heart rate or heart rate reserve at which you work.
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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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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 for Fat Loss
-The ACSM recommends to target a weekly exercise expenditure of approximately 1000 kcals a week (e.g. 3 sessions of 300 Calories or 4 sessions of 200 Calori
es) (ACSM 1995). See Calorie Expenditure Calculator.
-Review of the scientific literature suggests moderate intense aerobic activity needs to be performed most days of the week to bring about signi
ficant fat loss. Some sources recommend brisk walking progressing to 45 minutes or more daily. Other authorities recommend working up to 60-90 minutes of daily physical activity for weight loss.
-A
lternating weight bearing with non-weight bearing exercises every other day may be recommended to minimize the repetitive orthopedic stresses of exercising daily.
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