Sentija’s new model for determination of heart rate deflection point (HRDP) does not have agreement with the maximal lactate steady state (MLSS)

Document Type : original article


Background and aims: Recently Sentija et al. have validated and introduced a fast running exhaustive test (Tfast) for determination of heart rate deflection point (HRDP). However, the proposed test is not according to the recommended standards in the literature. Therefore, the present study aimed to examine the agreement between the HRDP determined by the Tfast and the maximal lactate steady state model (MLSS).
Methods: Eleven young wrestler men underwent on subsequent occasions of a series of constant-velocity treadmill runs to determine MLSS. Heart rate data was obtained during the Tfast [speed increments of 1 km/h every 30 s] by using telemetry and HRDP was determined by using the S.Dmax model. Inter-observer reliability was analyzed using Bland-Altman plots and by determination of the Intraclass Correlation Coefficient (ICC).
Results: The results indicated poor agreement between HRDP and HR of the criterion method (HRMLSS) (±1.96; 95% CI= -9.7 to +18.8 b/min; ICC= -0.09). Furthermore, poor agreement was observed between speed at HRDP (SpeedHRDP) and speed of the criterion method (SpeedMLSS) (±1.96; 95% CI= -2.3 to +3.9 km/h; ICC= 0.40).
Conclusion: According to the results it is concluded that the proposed protocol (Tfast) by Sentija et al cannot be used as a reliable method instead criterion method (MLSS). Therefore the Tfast is not recommended for efficient running intensity prescription.


  1. - Adams WC, Fox RH, Fry AJ, Mac Donald IC. (1975). Thermoregulation during marathon running in cool, moderate, and hot environments. J Appl Physiol; 38:1030–1037.
  2. - Beneke R. (2003). Methodological aspects of maximal lactate steady state—implications for performance testing. Eur J Appl Physiol; 89:95-99.
  3. - Billat V, Sirvent P, Py G, Koralsztein JP, Mercier J. (2003). The concept of maximal lactate steady state: a bridge between biochemistry, physiology and sport science. Sports Medicine; 33:407-426.
  4. - Binder RK, Wonisch M, Corra U, Cohen-Solal A, Vanhees L, Saner H, Schmid JP. (2008). Methodological approach to the first and second lactate threshold in incremental cardiopulmonary exercise testing. Eur J Cardiovasc Prev Rehabil; 15(6):726-734.
  5. - Bland JM, Altman DG. (1986). Statistical methods for assessing agreement between two methods of clinical measurement. Lancet; 1:307–10.
  6. - Bodner ME, Rhodes EC. (2000). A review of the concept of the heart rate deflection point. Sports Med; 30:31-46.
  7. - Bosquet L, Leger L, Legros P. (2002). Methods to determine aerobic endurance. Sports Medicine; 32(11):675-700.
  8. - Cheng B, Kuipers H, Snyder AC, Keizer HA, Jeukendrup A, Hesselink M. (1992). A new approach for determining of ventilatory lactate thresholds. Int J Sports Med; 13:518.
  9. - Conconi F, Ferrari M, Ziglio PG, Droghetti P, Codeca L. (1982). Determination of the anaerobic threshold by a noninvasive field test in runners. J Appl Physiol Respir Environ Exerc Physiol; 52:869-873.
  10. - Conconi F, Grazzi G, Casoni I, Guglielmini C, Borsetto C, Ballarin E, et al. (1996). The Conconi test: methodology after 12 years of application. int J Sports med; 17:509-519.
  11. - De Assis Pereira PE, Piubelli Carrara VK, Mello Rissato G, Pereira Duarte JM, Guerra RL, Silva Marques de Azevedo PH. (2015). The relationship between the heart rate deflection point test and maximal lactate steady state. J Sports Med Phys Fitness; [EPUB ahead of print].
  12. - Debray P, Dey SK. (2007). A comparison of the point of deflection from linearity of heart rate and the ventilatory threshold in the determination of the anaerobic threshold in Indian boys. J Physiol Anthropol; 26(1):31–37.
  13. - Dickhuth HH, Yin L, Niess A, Rocker K, Mayer F, Heitkamp HC, et al. (1999). Ventilatory, lactate-derived and catecholamine thresholds during incremental treadmill running: relationship and reproducibility. Int J Sports Med; 20:122-7.
  14. - Faude O, Kindermann W, Meyer T. (2009). Lactate Threshold Concepts How Valid are They? Sports Med; 39 (6): 469-490.
  15. - Fell JW. (2008). The modified D-Max is a valid lactate threshold measurement in veteran cyclists. J Sci Med Sport; 11:460-463.
  16. - Gaisl G, Hofmann P. (1989). A noninvasive method for the determination of the anaerobic threshold in children and sedentary persons. Revista Brasileira de Ciencia e Moviemento; 3:42–50.
  17. - Heck H, Hess G, Mader A. (1985). Comparative study of different lactate threshold concepts [Vergleichende Untersuchung zu verschiedenen Laktat-Schwellenkonzepten]. Dtsch Z Sportmed; 36(12):19-25, 40-52.
  18. - Hofmann P, Pokan R. (2010). Value of the Application of the Heart Rate Performance Curve in Sports. Int J Sports Physiol Perform; 5:437-447.
  19. - Hofmann PR, Pokan K, Preidler K, Leitner H, Szolar D, Eber B, Schwaberger G. (1994). Relationship between heart rate threshold, lactate turn point and myocardial function. Int J Sports Med; 15(5):232-237.
  20. - Hofmann P, Wonisch M, Pokan R, Schwaberger G, Smekal G, von Duvillard SP. (2005). Beta1-adrenoceptor mediated origin of the heart rate performance curve deflection. Med Sci Sports Exerc; 37:1704-9.
  21. - Ignjatović A, Hofmann P, Radovanović D. (2008). Non-invasive determination of anaerobic theresholds based on the heart rate deflection point. FU Phys Ed Sport; l(6):1- 10.
  22. - Jeukendrup AE, Hesselink MK, Kuipers H, Keizer HA. (1997). The Conconi test. Int J Sports Med; 18(5):393–396.
  23. - Jones AM, Doust JH. Lack of reliability in Conconi's heart rate deflection point. (1995). Int J Sports Med; 16:541-544.
  24. - Jones AM, Doust JH. (1997). The Conconi test is not valid for estimation of the lactate turnpoint in runners. J sports sci; 15:385-394.
  25. - Kara M, Gokbel H, Bediz C, Ergene N, Ucok K, Uysal H. (1996). Determination of the heart rate deï‌‚ection point by the Dmax method. J Sports Med Phys Fitness; 36:31–34.
  26. - Kiani Mavi N, Siahkuhian M, Hashemi Majd K. (2010). The correlation between Heart Rate Deflection Point (HRDP) and the Potassium Turn Point (KTP) in Athlete Young Men. Journal of Ardabil University of Medical Sciences; 10(1):64-71. [Full Text in Persian]
  27. - Kindermann W, Simon G, Keul J. (1979). The significance of the aerobic-anaerobic transition for the determination of work load intensities during endurance training. Eur J Appl Physiol; 42: 25-34.
  28. - Lepretre PM, Foster C, Koralsztein JP, Billat VL. (2005). Heart rate deï‌‚ection point as a strategy to defend stroke volume during incremental exercise. J Appl Physiol (1985); 98(5):1660-1665.
  29. - Marques-Neto SR, Maior AS, Maranhão Neto GA, Santos EL. (2012). Analysis of heart rate deflection points to predict the anaerobic threshold by a computerized method. J Strength Cond Res; 26(7):1967-1974.
  30. - McLellan TM. (1985). Ventilatory and plasma lactate response with different exercise protocols: a comparison of methods. Int J Sports Med; 6:30-5.
  31. - McNaughton L, Wakefield G, Fasset R, Bentley D. (2001). A comparison of lactate kinetics, minute ventilation and acid-base balance as measure of the anaerobic threshold. Journal of Human Moviment Studies; 41:247-61.
  32. - Meamarbashi A, Alipour M. (2014). Moderate dose of watercress and red radish does not reduce oxygen consumption during graded exhaustive exercise. Avicenna J Phytomed; 4(4):267–272.
  33. - Pokan R, Hofmann P, Preidler K, Leitner H, Dusleag J, Eber B, et al. (1993). Correlation between inflection of heart rate/work performance curve and myocardial function in exhausting cycle ergometer exercise. Eur J Appl Physiol; 67:385-388.
  34. - Portney LG, Watkins MP. (2000). Foundations of clinical research Application to practice. Prentice Hall Inc. New Jersey ISBN 0-8385-2695-0: 560-567.
  35. - Pokan R, Hofmann P, von Duvillard SP, Smekal G, Hogler R, Tschan H, et al. (1999). The heart rate turn point reliability and methodological aspects. Med Sci Sports Exerc; 31(6):903-907.
  36. - Rosic G, Pantovic S, Niciforovic J, Colovic V, Rankovic V, Obradovic Z, Rosic M. (2011). Mathematical analysis of the heart rate performance curve during incremental exercise testing. Acta Physiol Hung; 98(1):59-70.
  37. - Santos EL, Novaes JS, Reis VM, Giannella-Neto A. (2010). Low sampling rates bias outcomes fromtheWingate Test. Int J SportsMed; 31:784–789.
  38. - Sentija D, Vucetic V, Markovic G. (2007). Validity of the modified Conconi running test. Int J Sports Med; 28:1006-1011.
  39. - Siahkouhian M, Meamarbashi A. (2013). Advanced methodological approach in determination of the heart rate deflection point: S.Dmax versus L.Dmax methods. J Sports Med Phys Fitness; 53:27-33.
  40. - Siahkouhian M, Khodadadi D. (2013). Narita Target Heart Rate Equation Underestimates the Predicted Adequate Exercise Level in Sedentary Young Boys. Asian J Sports Med; 4:175-180.
  41. - Siahkohian M. (2007). A new mathematical model for determination of heart rate deflection point. Int J Fitness; 3:11-316.
  42. - Svedahl K, MacIntosh BR. (2003). Anaerobic Threshold: The Concept and Methods of Measurement. Can J Appl Physiol; 28:299-323.
  43. - Thorlund W, Podolin DA, Mazzeo RS. (1994). Coincidence of lactate threshold and HR-power output threshold under varied nutritional states. Int J Sports Med; 15:301-304.
  44. - Vachon JA, Bassett Jr DR, Clarke S. (1999). Validity of the heart rate deflection point as a predictor of lactate threshold during running. J Appl Physiol; 87:452-459.
  45. - Vucetić V, Sentija D, Sporis G, Trajković N, Milanović Z. (2014). Comparison of ventilation threshold and heart rate deflection point in fast and standard treadmill test protocols. Acta Clin Croat; 53:190-203.
Volume 10, Issue 1 - Serial Number 1
September 2017
Pages 31-40
  • Receive Date: 07 March 2016
  • Revise Date: 22 April 2024
  • Accept Date: 31 December 2020
  • First Publish Date: 31 December 2020
  • Publish Date: 22 November 2017