اعتبار آزمون تعدیل شده کانکانی برای تعیین حداکثر لاکتات حالت پایدار در مردان جوان ورزشکار

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری فیزیولوژی ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، ایران

2 استاد گروه فیزیولوژی ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

سابقه و هدف: هدف از مطالعه حاضر ارزیابی اعتبار آزمون تغییر یافته کانکانی برای تعیین حداکثر لاکتات حالت پایدار در مردان جوان ورزشکار بود.
روش شناسی: 11 کشتی‌گیر مرد (سن: 3/1 ± 01/19 سال، قد: 54/3 ± 64/176 سانتی‌متر، :BMI 0 /4±7/23 کیلوگرم/مترمربع، VO2max: 67/3 ± 08/51 میلی لیتر/کیلوگرم/دقیقه) به صورت هدفمند انتخاب شدند و آزمون‌های ورزشی فزاینده در دو جلسه با فاصله 48 ساعت؛ 1- پروتکل تغییر یافته کانکانی (5/1 % شیب، سرعت شروع Km3 ، افزایش سرعت یک کیلومتر هر 60 ثانیه) 2- آزمون مبنا: فزاینده تا سطح MLSS ، را بر روی نوارگردان اجرا کردند. HRDP با استفاده از مدل S.Dmax تعیین شد. برای ارزیابی همگرایی بین دو روش، از مدل گرافیکی بلاند-آلتمن و همگرایی درونی(ICC) استفاده شد.
یافته‌ها: نتایج نشان داد که بین HRDP بدست آمده از آزمون کانکانی، با HRMLSS در روش مبنا همگرایی بالایی وجود دارد (96/1± ، CI : 95%، 4/2- تا 7/7 ضربه/دقیقه ؛ ICC: 81/0). همچنین، بین سرعت در HRDP (SpeedHRDP) و سرعت در بیشینه فلات لاکتات (SpeedMLSS) همگرایی بالایی مشاهده شد (96/1± ، CI : 95%، 57/0- تا 95/0+ کیلومتر در ساعت؛83/0= ICC).
نتیجه گیری: HRDP و SpeedHRDP بدست آمده در آزمون تغییر یافته کانکانی در کشتی گیران جوان می‌تواند مقادیر HRMLSS و SpeedMLSS را پیشگویی نماید. به نظر می رسد این آزمون بتواند جایگزین مناسبی برای روش‌های تهاجمی در تعیین آستانه بی‌هوازی باشد و به عنوان یک آزمون آسان، غیرتهاجمی وکوتاه برای تجویز شدت تمرین در ورزشکاران به کار رود.

کلیدواژه‌ها


عنوان مقاله [English]

Validity of the modified Conconi test for determining of the maximal lactate steady state in young male athletes

نویسندگان [English]

  • Samad Esmaeilzadeh 1
  • Marefat Siahkouhian 2
1 Faculty of Education and Psychology, Mohaghegh Ardabali University, Ardabil, Iran
2 Professor of Exercise Physiology,Faculty of Education and Psychology, Mohaghegh Ardabali University, Ardabil, Iran
چکیده [English]

Background & Purpose: The aim of this study was to survey the validity of the modified Conconi running test for determining of the maximal lactate steady state in young male athletes.
Methodology: 11 young wrestler men were selected (Mean ± SD Age 19.01 ± 1.3 yrs., Height 176.64 ± 3.54 cm, BMI: 23.7 ± 4.0 kg/m2, VO2max: 51.08 ± 3.67 ml/kg/min) and incremental exercise tests in two sessions with an interval of 48 hours {1- accordance to conconi modified protocol (slope:1.5%, began speed: 3 km/h, increasing the speed of one Km per 60 sec) 2. criterion test: Increasing up MLSS }performed on a treadmill. The HRDP was determined by the S.Dmax model. Bland-Altman graphical model and Interclass Correlation Coefficient (ICC) statistical tests were used to evaluate the absolute agreement of the methods.
Results: The results indicated high agreement between HRDP and HR of the criterion method (HRMLSS) (±1.96; 95% CI= -2.4 to +7.7 b/min; ICC= 0.81). Moreover, high agreement was observed between speed at HRDP (SpeedHRDP) and speed of the criterion method (SpeedMLSS) (±1.96; 95% CI= -0.57 to +0.95 km/h; ICC= 0.83).
Conclusion: The HR and velocity at the deflection point determined by the modified Conconi running test could predict the HRMLSS and speedMLSS. It seems that this test could be a good alternative to more invasive method to determine the anaerobic threshold test as a simple, noninvasive short for the prescribed exercise intensity in athletes used.

کلیدواژه‌ها [English]

  • Conconi running test
  • Heart rate deflection point
  • Maximal lactate steady state
##Svedahl K, MacIntosh BR. 2003. Anaerobic Threshold: The Concept and Methods of Measurement. Can J Appl Physiol. 28:299-323. ##Bodner ME, Rhodes EC. 2000. A review of the concept of the heart rate deflection point. Sports Med. 30:31-46. ##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. ##Faude O, Kindermann W, Meyer T. 2009. Lactate Threshold Concepts How Valid are they? Sports Med. 39: 469-490. ##Heck H, Hess G, Mader A. 1985. Comparative study of different lactate threshold concepts [Vergleichende Untersuchung zu verschiedenen Laktat-Schwellenkonzepten]. Dtsch Z Sportmed. 36:19-25. ##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##Beneke R. 2003. Methodological aspects of maximal lactate steady state implications for performance testing. Eur J Appl Physiol. 89:95-99. ## 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. ## 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. ## 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 Sport’s med. 17:509-519. ##Jones AM, Doust JH. 1995. Lack of reliability in Conconi's heart rate deflection point. Int J Sports Med. 16:541-544. ##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. ##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. ##Siahkohian M. 2007. A new mathematical model for determination of heart rate deflection point. Int J Fitness. 3:11-316. ##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. ##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. ##  Fell JW. 2008. The modified D-Max is a valid lactate threshold measurement in veteran cyclists. J Sci Med Sport. 11:460-463. ##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. ##Tokmakidis SP, Leger L. 1988. External validity of the Conconi’s heart rate anaerobic threshold as compared to the lactate threshold. Exerc Physiol. 3: 43-58. ##Aunola S, Rusko H. 1992. Does anaerobic threshold correlate with maximal lactate steady state? J Sport Sci. 10: 309-323. ##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. 98:59-70. ##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. 31:903-907. ##Sentija D, Vucetic V, Markovic G. 2007. Validity of the modified Conconi running test. Int J Sports Med. 28:1006-1011. ##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. ##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. 26:31–37. ##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. ##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. ##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. ##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:1- 10. ##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. ##Santos EL, Novaes JS, Reis VM, Giannella-Neto A. 2010. Low sampling rates bias outcomes fromtheWingate Test. Int J SportsMed. 31:784–789. ##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. 26:1967-1974. ##Kara M, Gokbel H, Bediz C, Ergene N, Ucok K, Uysal H. 1996. Determination of the heart rate deflection point by the Dmax method. J Sports Med Phys Fitness. 36:31–34. ##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. J Ardabil Univ Med Sci. 10:64-71. [Full Text in Persian] ##MeamarbashiA,  Alipour M. 2014. Moderate dose of watercress and red radish does not reduce oxygen consumption during graded exhaustive exercise. Avicenna J Phytomed. 4:267–272. ##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]. ##Bland JM, Altman DG. 1986. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1:307–10. ##Portney LG, Watkins MP. 2000. Foundations of clinical research Application to practice. Prentice Hall Inc. New Jersey ISBN 0-8385-2695-0, 560-567. ##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. ##Bosquet L, Léger L, Legros P. 2002. Methods to determine aerobic endurance. Sports Medicine. 32(11):675-700. ##Jeukendrup AE, Hesselink MK, Kuipers H, Keizer HA. 1997. The Conconi test. Int J Sports Med. 18(5):393–396. ##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. ##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. ##Lepretre PM, Foster C, Koralsztein JP, Billat VL. 2005. Heart rate deflection point as a strategy to defend stroke volume during incremental exercise. J Appl Physiol.  98(5):1660-1665. ##