Mathematical Modeling and Expression of Heart Rate Deflection Point Using Heart Rate and Oxygen Consumption

Authors

Kayla M. Baker, University of Central FloridaFollow
David H. Fukuda Ph.D., University of Central FloridaFollow
David Church, University of Central FloridaFollow
Michael B. La Monica, University of Central FloridaFollow
Kyle S. Beyer, University of Central FloridaFollow
Jay R. Hoffman, University of Central FloridaFollow
Jeffrey R. Stout Ph.D., University of Central FloridaFollow

Abstract

International Journal of Exercise Science 10(4): 592-603, 2017. Heart rate deflection point (HRDP) can be determined through different mathematical-modeling procedures, such as bi-segmental linear regression (2SEG) or maximal distance model (Dmax). The purpose was to compare heart rate (HR) and oxygen consumption (VO₂) at HRDP when using 2SEG and Dmax, and to examine their relationships with respiratory compensation point (RCP) and running performance. Nineteen participants completed a graded exercise test (GXT), to determine HRDP and RCP, and a 5km treadmill time trial (5K_time). No differences were found in HR or VO₂ when comparing HRDP_2SEG, HRDP_Dmax, and RCP. Strong correlations were found between HRDP_2SEG, HRDP_Dmax, and RCP when using HR and VO₂. No relationships were found between 5K_time and HR at HRDP or RCP; however, strong relationships were found with VO2. While 2SEG and Dmax may be interchangeable in determining HRDP, VO₂ at HRDP and RCP yielded stronger relationships to 5K_time than HR. Therefore, VO₂ at HRDP may be a better predictor of running performance than HR.

Recommended Citation

Baker, Kayla M.; Fukuda, David H. Ph.D.; Church, David; La Monica, Michael B.; Beyer, Kyle S.; Hoffman, Jay R.; and Stout, Jeffrey R. Ph.D. (2017) "Mathematical Modeling and Expression of Heart Rate Deflection Point Using Heart Rate and Oxygen Consumption," International Journal of Exercise Science: Vol. 10 : Iss. 4, Pages 592 - 603.
Available at: https://digitalcommons.wku.edu/ijes/vol10/iss4/12