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In article <12JUL96.10830954.0066@VM1.MCGILL.CA> Andrew Graham <BGJN000@MUSICB.MCGILL.CA> writes:
>In article <12JUL96.10759136.0082@VM1.MCGILL.CA> Andrew Graham <BGJN000@MUSICB.MCGILL.CA> writes:
>>Hi,
>>
>>   I'm hoping someone can help me with interpolation of some data I'm
>>anylyzing for my research.
>>
>>   Here is the problem:
>>
>>   I'm using a Step Test from the Canadian Standardized Test of Fitness
>>to predict maximum oxygen uptake (VO2max) of Persons with an
>>Intellectual Disability. The test requires the subjects to step up
>>and down two stairs at a pre-established tempo.The subjects I am testing
>>have difficulty maintaining the tempo so we count the acsents to
>>determine what level they are actually stepping at.This neccessitates an
>>adjustment in the constant used in the calculation for VO2 max.
>>Below I will provide a table of stages of stepping with their
>>corresponding stepping rates in ascents per minute. Also a table with
>>stages and their constants.
>>
>>      Stage      Ascents/min            Table of Constants (L/min)
>>      -----      ---------              --------------------------
>>        1          11
>>        2          14                   Stage       Constant
>>        3          17                   -----       --------
>>        4          19                     1          1.1391
>>        5          22                     2          1.3466
>>        6          24                     3          1.6250
>>        7          26                     4          1.8255
>>                                          5          2.0066
>>                                          6          2.3453
>>                                          7          2.7657
>>
>>        John is supposed to maintain a stepping rate of 26 ascents/min
>>for a total of 78 ascents in the final level of the test.He has actually
>>stepped an average of 16.3 ascents/min and a total of 49 ascents in the
>>final level of the test. Based on his actual stepping rate we can see
>>that he is stepping between stage 2 and 3. This also means that the
>>constant lies somwhere between 1.3466 (stage 2) and 1.6250 (stage 3).
>>
>>        Question: how do I calculate the constant based on John's actual
>>                  actual stepping rate which lies between 14 and 17
>>                  ascents/min.?
>>
>>                  By the way,from previous data sheets I have obtained I
>>know the answer is 1.56.I just don't know how the researchers calculated
>>it. I have tried cross multiplying and haven't obtained consistent
>>results. I'll put John's date in table form to make it easier to look at
>>
>>Ideal stepping rate      Stage               Constant
>>-------------------      -----               --------
>>  26 ascents/min           7                  2.7657
>>
>>Actual Stepping rate     Stage               Constant
>>--------------------     ------              --------
>>  16.3 ascents/min       between 2 & 3          ?
>>
>>Any help would be appreciated.
>>
>>Cheers,
>>
>>Andrew
>>
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