chrlil1

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  • The trick is to figure out what your target heart rate is based on your age/weight and reach that and maintain it for about 20 minutes. For some it is hard to get to their target heart rate thus making the workout really hard whereas others can get to their rate quickly. There should be some charts on the internet to give…
    in Intensity and length of time Comment by chrlil1 January 2011
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