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Study related to the double product break point during the graded exercise test

Research Project

Project/Area Number 08458023
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 体育学
Research InstitutionFukuoka University

Principal Investigator

TANAKA Hiroaki  Fukuoka Univ., Fac. Sports & Health Sci., Prof., スポーツ科学部, 教授 (00078544)

Co-Investigator(Kenkyū-buntansha) TANAKA Mamoru  FukuokaUniv., Fac. Sports & Health Sci., Prof., スポーツ科学部, 教授 (00163577)
KIYONAGA Akira  FukuokaUniv., Fac. Sports & Health Sci., Prof., スポーツ科学部, 教授 (70177955)
SHINDO Munehiro  FukuokaUniv., Fac. Sports & Health Sci., Prof., スポーツ科学部, 教授 (30078539)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1996: ¥3,900,000 (Direct Cost: ¥3,900,000)
KeywordsExercise Testing / Double Product / Physical Fitness / 生活習慣病 / 運動負荷 / エピネフリン / ノルエピネフリン / 血圧 / 心拍数 / 交感神経
Research Abstract

The purpose of this study was to examine the relationship between the catecholamine threshold (CAT) and the double product break point (DPBP) under various condition and to pursue the validity of DPBP as the marker of aerobic capacity for the optimal exercise intensity to improve physical fitness. We found the following.
(1) Significant negative relationship between DPBP and CAT under both nomoxic and hyposic conditions was found. As expected, the slope of the DP against Vo2 increases steeply above the CAT. These findings confirmed our hypothesis that DPBP implies steeper increases in sympathetic nervous activity.
(2) Hypoximia did not alter the % VO2 max at the DPBP. In addition, both the DPBP and VT in patients with heart disease changed proportionally with the VOィイD22ィエD2 peak after exercise training. These findings suggest that it is useful marker of the endurance capacity as well as to determine the optimal exercise intensity to improve aerobic capacity.
(3) Beta blockers did not dissociate DPBP from VT as may have been expected. The strong positive correlation between DPBP and VT indicates that DPBP can be used as an alternative to VT.
(4) The slope of the regression line formed for the mean blood pressure above the VT was greater than that below the VT. This result suggests that the mean blood pressure increases nonlinearly to increase in work load during graded exercise and the slope becomes much steeper above the VT.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] H.Tanaka et al: "Algorithan of automation for DPBP measurement"Exercise for Preventing for common Diseaes. in Press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] P,Nagoya et al: "mean blood pressure increases above the ventilatory threshold"Exercise for preventing hor common Disease. in Press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.L.Fox et al: "Effect of exercise training on vetilatory and double product threshold of patients with heart disease"Exercise for Preventing for common Disease. in Press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Tanaka et al: "Algorithm of automation for DPBP measurement"Exercise for Preventing for Common Disease. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] R.Nagaya et al: "Mean blood pressure increases above the ventilatory threshold"Exercise for Preventing for Common Disease. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.L.Fox et al: "Effects of exercise training on ventilatory and double product threshold of patients with heart disease"Exercise for Preventing for Common Disease. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary

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Published: 1996-04-01   Modified: 2016-04-21  

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