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Int J Sports Med 2010; 31(7): 482-485
DOI: 10.1055/s-0030-1248284
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

Changes in Individual Glucose Threshold during Military Training

C. Rocha1 , A. Canellas2 , D. Monteiro2 , M. Antoniazzi2 , P. H. S. M. Azevedo3
  • 1Gama Filho University, Post-Graduate Program in Physiology and Kinesiology of Physical Fitness and Health, Rio de Janeiro, Brazil
  • 2Gama Filho University, Post-Graduate Program in Physiology and Kinesiology of Physical Fitness and Health, Brasília, Brazil
  • 3Anhanguera College of Bauru, Physical Education, Bauru, Brazil
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Publikationsverlauf

accepted after revision January 11, 2010

Publikationsdatum:
27. April 2010 (online)

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Abstract

The objective of the present study was to assess any improvement in the IGT (Individual Glucose Threshold) of soldiers during military physical training (MPT). Nine healthy non-athlete recruits (mean weight: 66.3±7.9 kg; mean height: 1.77±0.05 cm; mean age: 18.4±0.5 year) were submitted to incremental ergometric test on a treadmill. The initial speed was 6.0 km.h−1 followed by increment of 1.0 km.h−1 every 2 min until the subject became exhausted. Between running stages, a 15 s pause allowed 5 μL of capillary blood sample to be collected from the earlobe for glucose analysis. The IGT was determined by blood glucose concentration ([Gluc]) kinetics considering the exercise intensity corresponding to the lower [Gluc] during the test. The tests were conducted in four steps: before and after exactly 30, 60, and 90 days of training. The results showed that IGT was initially detected at 9.4±1.8 km.h−1 but shifted to 11.4±1.9, 11.2±2.1 and 11.9±1.4 at 30, 60, and 90 days of training, respectively. A significant improvement after 30 and 90 days of training (p<0.05) compared to baseline. We concluded that the IGT shifted to higher exercise intensities after MPT. Future studies examining different training modalities are required to verify our results.

Key words

minimum glucose levels - performance index - anaerobic threshold - sensitivity

References

  • 1 Ainslie PN, Campbell IT, Frayn KN, Humphreys SM, MacLaren DP, Reilly T. Physiological, metabolic, and performance implications of a prolonged hill walk: influence of energy intake.  J Appl Physiol. 2003;  94 1075-1083
    PubMedSuche in Google Scholar
  • 2 Aunola S, Rusko H. Does anaerobic threshold correlate with maximal lactate steady-state?.  J Sports Sci. 1992;  10 309-323
    CrossrefPubMedSuche in Google Scholar
  • 3 Beneke R. Methodological aspects of maximal lactate steady state-implications for performance testing.  Eur J Appl Physiol. 2003;  89 95-99
    CrossrefPubMedSuche in Google Scholar
  • 4 Brasil. . Manual de Campanha – C 20–20: Treinamento Físico Militar.  Brasilia: EGGCF. 2002; 
    PubMedSuche in Google Scholar
  • 5 Brooks GA, Dubouchaud H, Brown M, Sicurello JP, Butz CE. Role of mitochondrial lactate dehydrogenase and lactate oxidation in the intracellular lactate shuttle.  Proc Natl Acad Sci USA. 1999;  96 1129-1134
    CrossrefPubMedSuche in Google Scholar
  • 6 Campbell CSG, Simões HG, Denadai BS. Influence of glucose and caffeine administration on identification of the lactate threshold.  Med Sci Sports Exerc (supplement). 1998;  30 S327
    PubMedSuche in Google Scholar
  • 7 Febbraio MA, Hiscock N, Sacchetti M, Fischer CP, Pedersen BK. Interleukin-6 is a novel factor mediating glucose homeostasis during skeletal muscle contraction.  Diabetes. 2004;  53 1643-1648
    CrossrefPubMedSuche in Google Scholar
  • 8 Fitts RH. Cellular mechanisms of muscle fatigue.  Physiol Rev. 1994;  74 49-94
    CrossrefPubMedSuche in Google Scholar
  • 9 Fujimoto T, Kemppainen J, Kalliokoski KK, Nuutila P, Ito M, Knuuti J. Skeletal muscle glucose uptake response to exercise in trained and untrained men.  Med Sci Sports Exerc. 2003;  35 777-783
    CrossrefPubMedSuche in Google Scholar
  • 10 Gladden LB. A lactatic perspective on metabolism.  Med Sci Sports Exerc. 2008;  40 477-485
    PubMedSuche in Google Scholar
  • 11 Harriss DJ, Atkinson G. International Journal of Sports Medicine – Ethical Standards in Sport and Exercise Science Research.  Int J Sports Med. 2009;  30 701-702
    Suche in Google Scholar
  • 12 Junior PB, Neiva CM, Denadai BS. Effect of an acute beta-adrenergic blockade on the blood glucose response during lactate minimum test.  J Sci Med Sport. 2001;  4 257-265
    CrossrefPubMedSuche in Google Scholar
  • 13 Kjaer M. Regulation of hormonal and metabolic responses during exercise in humans.  Exerc Sport Sci Rev. 1992;  20 161-184
    PubMedSuche in Google Scholar
  • 14 Mader A, Heck H. A theory of the metabolic origin of “anaerobic threshold”.  Int J Sports Med. 1986;  7 ((Suppl. 1)) 45-65
    Thieme ConnectPubMedSuche in Google Scholar
  • 15 Miller BF, Fattor JA, Jacobs KA, Horning MA, Navazio F, Lindinger MI, Brooks GA. Lactate and glucose interactions during rest and exercise in men: effect of exogenous lactate infusion.  J Physiol. 2002;  544 963-975
    CrossrefPubMedSuche in Google Scholar
  • 16 Nordsborg N, Bangsbo J, Pilegaard H. Effect of high-intensity training on exercise-induced gene expression specific to ion homeostasis and metabolism.  J Appl Physiol. 2003;  95 1201-1206
    PubMedSuche in Google Scholar
  • 17 Oliveira JC, Baldissera V, Simões HG, Aguiar AP, Azevedo PHSM, Poian PAFO, Perez SEA. Identification of the lactate threshold and the blood glucose threshold in resistance exercise.  Rev Bras Med Esporte. 2006;  12 333-338
    PubMedSuche in Google Scholar
  • 18 Opstad PK, Ekanger R, Nummestad M, Raabe N. Performance, mood, and clinical symptoms in men exposed to prolonged, severe physical work and sleep deprivation.  Aviat Space Environ Med. 1978;  49 1065-1073
    PubMedSuche in Google Scholar
  • 19 Pedersen BK, Steensberg A, Fischer C, Keller C, Keller P, Plomgaard P, Wolsk-Petersen E, Febbraio M. The metabolic role of IL-6 produced during exercise: is IL-6 an exercise factor?.  Proc Nutr Soc. 2004;  63 263-267
    CrossrefPubMedSuche in Google Scholar
  • 20 Philp A, Macdonald AL, Carter H, Watt PW, Pringle JS. Maximal lactate steady state as a training stimulus.  Int J Sports Med. 2008;  29 475-479
    Thieme ConnectPubMedSuche in Google Scholar
  • 21 Ribeiro L, Balikian P, Malachias P, Baldissera V. Stage length, spline function and lactate minimum swimming speed.  J Sports Med Phys Fitness. 2003;  43 312-318
    PubMedSuche in Google Scholar
  • 22 Rose AJ, Richter EA. Skeletal muscle glucose uptake during exercise: how is it regulated?.  Physiology (Bethesda). 2005;  20 260-270
    CrossrefPubMedSuche in Google Scholar
  • 23 Silva LGM, Pacheco ME, Campbell CS, Baldissera V, Simoes HG. Comparação entre protocolos diretos e indiretos de avaliação da aptidão aeróbia em indivíduos fisicamente ativos.  Rev Bras Med Esporte. 2005;  11 219-223
    PubMedSuche in Google Scholar
  • 24 Simoes HG, Campbell CS, Kushnick MR, Nakamura A, Katsanos CS, Baldissera V, Moffatt RJ. Blood glucose threshold and the metabolic responses to incremental exercise tests with and without prior lactic acidosis induction.  Eur J Appl Physiol. 2003;  89 603-611
    CrossrefPubMedSuche in Google Scholar
  • 25 Simões HG, Campbell CS, Kushnick MR, Nakamura A, Katsanos CS, Baldissera V, Moffatt RJ. Blood glucose threshold and the metabolic responses to incremental exercise tests with and without prior lactic acidosis induction.  Eur J Appl Physiol. 2003;  89 603-611
    CrossrefPubMedSuche in Google Scholar
  • 26 Simões HG, Campbell CSG, Baldissera V, Denadai BS, Kokubun E. Determination of the anaerobic threshold by blood lactate and glucose measurements in track tests for runners.  Rev Paul Educ Fís. 1998;  12 17-30
    PubMedSuche in Google Scholar
  • 27 Simões HG, Campbell CSG, Kokubun E, Denadai BS, Baldissera V. Determination of maximal lactate steady state velocity: coincidence with lower blood glucose.  Med Sci Sports Exerc (supplement). 1996;  28 S68-S77
    PubMedSuche in Google Scholar
  • 28 Simões HG, Grubert Campbell CS, Kokubun E, Denadai BS, Baldissera V. Blood glucose responses in humans mirror lactate responses for individual anaerobic threshold and for lactate minimum in track tests.  Eur J Appl Physiol. 1999;  80 34-40
    CrossrefPubMedSuche in Google Scholar
  • 29 Simões HG, Souza TNT, Yamaguti SAL, Campbell CS. Identificação do lactato mínimo e glicose mínima em indivíduos fisicamente ativos.  Rev Bras Cienc Mov. 2003;  11 71-75
    PubMedSuche in Google Scholar
  • 30 Sotero RC, Pardono E, Landwehr R, Campbell CS, Simões HG. Blood glucose minimum predicts maximal lactate steady state on running.  Int J Sports Med. 2009;  30 643-646
    Thieme ConnectPubMedSuche in Google Scholar
  • 31 Weitgasser R, Gappmayer B, Pichler M. Newer portable glucose meters – analytical improvement compared with previous generation devices?.  Clin Chem. 1999;  45 1821-1825
    PubMedSuche in Google Scholar

Correspondence

Prof. Paulo Henrique Silva Marques Azevedo

Anhanguera College of Bauru

Physical Education

Primaveras Street, 3-51

17.020-000 Bauru

Brazil

Telefon: +55/14/32399147

Fax: +55/16/33616439

eMail: paulohazevedo@yahoo.com.br