Acute Physiological and Thermoregulatory Responses to Extended Interval Training in Endurance Runners: Influence of Athletic Performance and Age

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This study aimed to describe the acute impact of extended interval training (EIT) on physiological and thermoregulatory levels, as well as to determine the influence of athletic performance and age effect on the aforementioned response in endurance runners. Thirty-one experienced recreational male endurance runners voluntarily participated in this study. Subjects performed EIT on an outdoor running track, which consisted of 12 runs of 400 m. The rate of perceived exertion, physiological response through the peak and recovery heart rate, blood lactate, and thermoregulatory response through tympanic temperature, were controlled. A repeated measures analysis revealed significant differences throughout EIT in examined variables. Cluster analysis grouped according to the average performance in 400 m runs led to distinguish between athletes with a higher and lower sports level. Cluster analysis was also performed according to age, obtaining an older group and a younger group. The one-way analysis of variance between groups revealed no significant differences (p≥0.05) in the response to EIT. The results provide a detailed description of physiological and thermoregulatory responses to EIT in experienced endurance runners. This allows a better understanding of the impact of a common training stimulus on the physiological level inducing greater accuracy in the training prescription. Moreover, despite the differences in athletic performance or age, the acute physiological and thermoregulatory responses in endurance runners were similar, as long as EIT was performed at similar relative intensity.

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  • Borg G. Psychophysical bases of perceived exertion. Med Sci Sports Exerc 1982; 14(5): 377-381

  • Brandon LJ Boileau RA. Influence of metabolic mechanical and physique variables on middle distance running. J Sports Med Phys Fitness 1992; 32(1): 1-9

  • Brinnel H Cabanac M. Tympanic temperature is a core temperature in humans. J Therm Biol 1989; 14(1): 47-53

  • Brooks GA. Cell-cell and intracellular lactate shuttles. J Physiol 2009; 587(23): 5591-600

  • Canfield TJ Gabel KA. Blood Lactate Heart Rate and Rating of Perceived Exertion in Collegiate Sprint Middle Distance and Long Distance Runners after 400 and 1600 Meter Runs. Int J Medical Pharm Eng 2013; 7(8): 218-221

  • Cheuvront SN Haymes EM. Thermoregulation and Marathon Running. Sport Med 2001; 31(10): 743-762

  • Daanen HAM Lamberts RP Kallen VL Jin A Meeteren NLU Van. A Systematic Review on Heart-Rate Recovery to Monitor Changes in Training Status in Athletes. Int J Sports Physiol Perform 2012; 7: 251-260

  • Drust B Rasmussen P Mohr M Nielsen B Nybo L. Elevations in core and muscle temperature impairs repeated sprint performance. Acta Physiol Scand 2005; 183: 181-190

  • Duffield R Coutts A Quinn J. Core temperature responses and match sprint exercise competition in warm. J Strenght Cond Res 2009; 23(4): 1238-1244

  • Facey A Irving R Dilworth L. Overview of Lactate Metabolism and the Implications for Athletes. Am J Sport Sci Med 2013; 1(3): 42-46

  • Fields KB Sykes JC Walker KM Jackson JC. Prevention of running injuries. Curr Sports Med Rep 2010; 9: 176-182

  • Folk GE Riedesel ML Thrift DL. Principles of integrative environmental physiology. Iowa: Austin and Winfield Publishers; 1998

  • Gellish RL Goslin BR Olson RE McDonald A Russi GD Moudgil VK. Longitudinal modeling of the relationship between age and maximal heart rate. Med Sci Sports Exerc 2007; 39(5): 822-9

  • Gorostiaga EM Asiáin X Izquierdo M Postigo A Aguado R Alonso JM Ibáñez J. Vertical jump performance and blood ammonia and lactate levels during typical training sessions in elite 400-m runners. J Strength Cond Res 2010; 24(4): 1138-49

  • Green HJ. Glycogen depletion patterns during continuous and intermittent ice skating. Med Sci Sports 1978; 10(3): 183-7

  • Hawley JA Myburgh KH Noakes TD Dennis SC. Training techniques to improve fatigue resistance and enhance endurance performance. J Sports Sci 1997; 15(3): 325-33

  • Hultman E Spriet LL. Skeletal muscle metabolism contraction force and glycogen utilization during prolonged electrical stimulation in humans. J Physiol 1986; 374(1): 493-501

  • Hunter I Hopkins JT Casa DJ. Warming up with an ice vest: core body temperature before and after crosscountry racing. J Athl Train 2006; 41(4): 371-4

  • Joyner MJ Ruiz JR Lucia A. The two-hour marathon: who and when? J Appl Physiol 2011; 110(1): 275-7

  • Kocoglu H Goksu S Isik M Akturk Z Bayazit YA. Infrared tympanic thermometer can accurately measure the body temperature in children in an emergency room setting. Int J Pediatr Otorhinolaryngol 2002; 65(1): 39-43

  • Krustrup P Mohr M Steensberg A Bencke J Kjaer M Bangsbo J. Muscle and blood metabolites during a soccer game: implications for sprint performance. Med Sci Sports Exerc 2006; 38(6): 1165-74

  • Lee JKW Nio AQX Lim CL Teo EYN Byrne C. Thermoregulation pacing and fluid balance during mass participation distance running in a warm and humid environment. Eur J Appl Physiol 2010; 109(5): 887-98

  • Léger LA Mercier D Gadoury C Lambert J. The multistage 20 metre shuttle run test for aerobic fitness. J Sports Sci 1988; 6(2): 93-101

  • Lim CL Byrne C Lee JKW. Human Thermoregulation and Measurement of Body Temperature in Exercise and Clinical Settings. Ann Acad Med Singapore 2008; 37(4): 347-353

  • McCartney N Spriet LL Heigenhauser GJ Kowalchuk JM Sutton JR Jones NL. Muscle power and metabolism in maximal intermittent exercise. J Appl Physiol 1986; 60(4): 1164-1169

  • Midgley AW McNaughton LR Jones AM. Training to Enhance the Physiological Determinants of Long- Distance Running Performance. Sport Med 2007; 37(10): 857-880

  • Moran DS Mendal L. Core Temperature Measurement. Sport Med 2002; 32(14): 879-885

  • Nielsen RO Buist I Sørensen H Lind M Rasmussen S. Training errors and running related injuries: a systematic review. Int J Sports Phys Ther 2012; 7(1): 58-75

  • Nybo L Schmidt JF Fritzdorf S Nordsborg NB. Physiological characteristics of an aging olympic athlete.Med Sci Sports Exerc 2014; 46(11): 2132-8

  • Piacentini MF Minganti C Ferragina A Ammendolia A Capranica L Cibelli G. Stress related changes during a half marathon in master endurance athletes. J Sports Med Phys Fitness 2014; 55(4): 329-36

  • Pujol P Verdaguer-Codina J Flor M. Heat stress and athletic performance. In: En Plata F Terrados N Vera P. (1994): The marathon technical and scientific aspects. Madrid: Alianza Deporte; 1994

  • Rabadán M Díaz V Calderón FJ Benito PJ Peinado AB Maffulli N. Physiological determinants of speciality of elite middle- and long-distance runners. J Sports Sci 2011; 29(9): 975-82

  • Roth R Verdile V Grollman L Stone D. Agreement Between Rectal and Tympanic Membrane Temperatures in Marathon Runners. Ann Emerg Med 1996; 28(4): 414-417

  • Vuorimaa T Vasankari T Rusko H. Comparison of Physiological Strain and Muscular Performance of Athletes During Two Intermittent Running Exercises at the Velocity Associated with V˙O2max. Int J Sports Med 2000; 21(2): 96-101

  • Vuorimaa T Virlander R Kurkilahti P Vasankari T Häkkinen K. Acute changes in muscle activation and leg extension performance after different running exercises in elite long distance runners. Eur J Appl Physiol 2006; 96(3): 282-91

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