Development of the automated double product break-point determining system
| Project/Area Number |
06558008
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
体育学
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| Research Institution | Fukuoka University |
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Principal Investigator |
TANAKA Hiroaki Fukuoka Univ., Fac.Physical Education, Professor, 体育学部, 教授 (00078544)
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| Co-Investigator(Kenkyū-buntansha) |
KIYONAGA Akira Fukuoka Univ., Fac.Physical Education, Professor, 体育学部, 教授 (70177955)
SHINDO Munehiro Fukuoka Univ., Fac.Physical Education, Professor, 体育学部, 教授 (30078539)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥10,200,000 (Direct Cost: ¥10,200,000)
Fiscal Year 1995: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1994: ¥7,500,000 (Direct Cost: ¥7,500,000)
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| Keywords | double product / blood lactate thereshold / exercise testing / physical fitness / exercise prescription / 心筋酵素消費量 |
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| Research Abstract |
Catecholamine concentrations are known to sharply increase in the blood at work rates above the blood lactate threshold (LT), and thus we hypothesized that the double product (DP,heart rate-systolic blood pressure product) may also abruptly increase at work rates above the LT.This research was aimed at devising automatic DPBP measurement system and to clarify whether the DPBP could determined during a ramp test on treadmill and cycle ergometer using thsi system. We devised the system which could measure SBP and HR automaticaly and displayd those on the monitor during exercise using a personal computer (NEC PC98). By this modification, we could automatically measure the DP almost every 15 sec. The DPBP was automatically determined using a computer algorithm as follows. The liner regression lines of DP as a function of W were calculated for all possible divisions of the data into two adjustment groups, and then the break-point was determined by the intersection of the two lines which represented the minimum residual sum of the squares. This modified apparatus could be used to determine DPBP in all suqomects including elderly and cardiac patient with a ramp test on treadmill as well as cycle ergometer. The test-retest reliability to determine the DPBP and correlation among the determined DPBP,LT,and VT was fairly good. Based on the above findings we therefore concluded that DPBP determined by this system is easy and a valid for evaluating a physical fitness and prescribing a optimal intensity.
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Report
(3 results)
Research Products
(8 results)
