Effect of Incremental Load of Circulatory Response on Double Product Break Point Detection

Abstract

Abstract. The purpose of this study was to examine the effect of circulatory response changes on DPBP evaliation. Seventeen healthy males and females who did not perform exercises daily participated in this study. All subjects performed a graded ergometric test that is generally performed on a cycle ergometer. The SBP and HR were measured at 1-min intervals. In healthy subjects who don't exercise daily, the relationship between HR and SBP, was described by a third order regression curve during exercise in males, and a continuously increasing linear equation in females. The relationship between work rate and DP was described by a third order regression curve during exercise in males, while there was no increase in suppression for females, for whom the relationship could be described by a linear equation. At DPBP, HR was 64.4 ± 4% for males and 60.4 ± 5% for females of maximum heart rate. It is possible to detect with DPBP, the increasing pattern of SBP or HR that was expressed as linear or third regression curve against the work load. It was suggested that DP can be compensated even when the increase of SBP (or HR) was low, because DP is the integral number of SBP and HR.

Double product break point estimates ventilatory threshold in individuals with type 2 diabetes

“…The AT can be identified using several markers representing different physiological systems. For instance, the AT has been determined through the analysis of heart rate variability (HRV) 2 ) , blood catecholamines 12 ) , blood glucose and lactate 3 ) , ventilation and respiratory equivalents 13 , 14 ) , and the double product (DP) 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ) .…”