University of Tehran Journal of Sport Biosciences 2008-9325 9 4 2017 12 22 The Effect of 6 Weeks of Interval Training Based on Heart Rate Deflection Point (HRDP) Extracted from D-Max Method on Blood Lactate Changes, Time to Fatigue and Performance of Young Soccer Players The Effect of 6 Weeks of Interval Training Based on Heart Rate Deflection Point (HRDP) Extracted from D-Max Method on Blood Lactate Changes, Time to Fatigue and Performance of Young Soccer Players 573 585 66095 10.22059/jsb.2018.135375.1005 FA Asghar Jalali MSc in Exercise Physiology, Department of Physical Education &amp; Sport Sciences, University of Payame Noor, Hamedan, Iran Mehdi Abbaspoor Assistance Professor in Exercise Physiology, Faculty of Physical Education &amp; Sport Sciences, Shahid Bahonar University of Kerman, Kerman, Iran. Mehdi Hakimi Ph.D in Exercise Physiology of Cardiovascular and Respiration, Department of Physical Education &amp; Sport Science, Marivan Branch, Islamic Azad University, Marivan, Iran. Maryam Ali-Mohammadi PhD student in Exercise Physiology of Cardiovascular and Respiration, Department of Physical Education and Sport Science, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran. Journal Article 2017 02 02 The aim of this study was the effect of 6 weeks of interval training based on heart rate deflection point (HRDP) extracted from D-Max method on blood lactate, performance and time to fatigue of young soccer players. 20 soccer players volunteered to participate in this study and were randomly divided into two groups: training (<em>n</em>=10) and control (<em>n</em>=10). Control group performed their club training 3 sessions a week for 6 weeks and training group conducted the interval training with equivalent intensity of HRDP based on D-Max method in addition to their club training. The dependent and independent t tests were used to determine intragroup and intergroup differences. The results showed that time to fatigue (<em>P</em>=0.00) and produced lactate (<em>P</em>=0.02) significantly increased only in the training group, but performance was improved in both training (<em>P</em>=0.02) and control (<em>P</em>=0.04) groups. Also, the training group showed significantly better effects on lactate (<em>P</em>=0.01), time to fatigue (<em>P</em>=0.03) and performance (<em>P</em>=0.00) in soccer players. Generally, coaches and soccer players are recommended to use interval training with equivalent intensity of HRDP extracted from D-Max method combined with their club training in order to achieve their training goals. The aim of this study was the effect of 6 weeks of interval training based on heart rate deflection point (HRDP) extracted from D-Max method on blood lactate, performance and time to fatigue of young soccer players. 20 soccer players volunteered to participate in this study and were randomly divided into two groups: training (<em>n</em>=10) and control (<em>n</em>=10). Control group performed their club training 3 sessions a week for 6 weeks and training group conducted the interval training with equivalent intensity of HRDP based on D-Max method in addition to their club training. The dependent and independent t tests were used to determine intragroup and intergroup differences. The results showed that time to fatigue (<em>P</em>=0.00) and produced lactate (<em>P</em>=0.02) significantly increased only in the training group, but performance was improved in both training (<em>P</em>=0.02) and control (<em>P</em>=0.04) groups. Also, the training group showed significantly better effects on lactate (<em>P</em>=0.01), time to fatigue (<em>P</em>=0.03) and performance (<em>P</em>=0.00) in soccer players. Generally, coaches and soccer players are recommended to use interval training with equivalent intensity of HRDP extracted from D-Max method combined with their club training in order to achieve their training goals. https://jsb.ut.ac.ir/article_66095_f1479a9782dbdd8f08e57a5331c91fe4.pdf