� #1
Old 02-28-2008, 01:12 PM
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The researchers recruited 36 volunteers who did not exercise regularly and had reported persistent fatigue based on a commonly used health survey.

The volunteers were divided into three groups: The first engaged in 20 minutes of moderate-intensity aerobic exercise three times a week for six weeks; the second engaged in low-intensity aerobic exercise for the same time period; the control group did not exercise.

The low- and moderate-intensity groups had a 20 percent increase in energy levels over the control group. Surprisingly, the low-intensity group had a greater reduction in fatigue levels than the moderate-intensity group, 65 percent compared to 49 percent, respectively.

�It could be that moderate-intensity exercise is too much for people who are already fatigued,� O�Connor said, �and that might contribute to them not getting as great an improvement as they would had they done the low-intensity exercise.�

He adds that energy and fatigue aren�t exactly opposites of each other. A student who stays up late to finish a term paper may feel fatigued, for example, but may also feel energized as she nears the end of the paper.

The volunteers in the study used exercise bikes that allowed the researchers to control their level of exertion so that low-intensity exercise was defined as 40 percent of their peak oxygen consumption and moderate-intensity exercise was defined as 75 percent of peak oxygen consumption. For comparison, O�Connor said a leisurely, easy walk is low-intensity exercise, while a fast-paced walk with hills is moderate-intensity exercise.

The team�s analysis also found that the improvements in energy and fatigue were not related to increases in aerobic fitness that the exercisers experienced. Puetz said the finding suggests that exercise acts directly on the central nervous system to increase energy and reduce fatigue.
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Old 02-28-2008, 02:52 PM
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I believe this. The more you exercise.. the more energy you have for day to day activities.

but... I also think maybe they have a point, in that a person that is fatigued is going to be more prone to do low intensity.. rather than moderate intensity exercise.

but.. that's the thing about exercise.. the more you do, the more you can do.
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Old 03-01-2008, 04:59 AM
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Yes! That's why we say - If you want something done, ask a busy person!

I deleted your duplicate post, as requested.
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