O trabalho possibilitou a verificação do fenômeno da fadiga durante a realização de corrida supramáxima intermitente, atendendo aos objetivos anteriormente propostos. Os resultados do trabalho evidenciaram uma clara tendência de aumento da carga externa e da pré-atividade muscular, acompanhadas de uma tendência de redução na intensidade recrutamento muscular e da freqüência mediana do sinal eletromiográfico durante a fase de apoio da corrida.
Pôde-se observar que, em decorrência do fenômeno da fadiga, houve significativas alterações nos padrões cinemáticos, dinâmicos, neuromusculares e fisiológicos, uma vez que o protocolo de indução de fadiga utilizado afetou a capacidade de controlar as cargas mecânicas e a capacidade de geração de força propulsiva.
Em resposta à suplementação com creatina, observou-se significativa influência da suplementação sobre o controle do choque mecânico produzido na corrida, entretanto, seu efeito sobre os parâmetros eletromiográficos não apontou tendências claras.
Por fim, considerando as limitações metodológicas impostas, sugere-se cautela na interpretação e extrapolação dos resultados obtidos no presente estudo para outras condições, uma vez que esses são dependentes do procedimento experimental utilizado.
REFERÊNCIAS BIBLIOGRÁFICAS
AHMUN, R.P.; TONG, R.J.; GRIMSHAW, P.N. The effects of acute creatine supplementation on multiple sprint cycle and running performance in rugby players. Journal of Strength and Conditioning Research, v.19, n.1, p.92-97, 2005.
ALLEN, D.G.; LANNERGREN, J.; WESTWRBLAD, H. Muscle cell function during prolonged activity: cellular mechanisms of fatigue. Experimental Physiology, v.80, p.497-527, 1995.
ALLEN, D.G.; WESTWRBLAD, H. Role of phosphate and calcium stores in muscle fatigue. Journal of Physiology, v.536, p. 657-665, 2001.
ARAÚJO, R. C. Utilização da eletromiografia na análise biomecânica do
movimento humano. 1998. 153 p. Tese (Doutorado em Educação Física) –
Escola de Educação Física da Universidade de São Paulo, São Paulo, 1998. ASCENSÃO, A.; MAGALHÃES, J.; OLIVEIRA, J.; DUARTE, J.; SOARES, J.
Fisiologia da fadiga muscular. Delimitação conceptual, modelos de estudo e mecanismos de fadiga de origem central e periférica. Revista Portuguesa de
Ciências do Desporto, v.3, n.1, p.108–123, 2003.
ASTRAND, P.O., RODAHL, K., DAHL, H.A., STROMME, S.B. Tratado de fisiologia
do trabalho. Bases fisiológicas do exercício. 4ºEd. Porto Alegre: Artmed,
2006.
AVOGRADO, P.; DONELEC, A.; BELLI, A. Changes in mechanical work during severe exhausting running. European Journal of Applied Physiology, v.90, p.165-170, 2003.
BALSOM, P.D.; HARRIDGE, S.D.R.; SODERLUND, K. Creatine supplementation per se does not enhance endurance exercise performance. Acta Physiologica
Scandinavica, v.149, p.521-523, 1993.
BALSOM, P.D.; SODERLUND, K.; SJODIN, B.; EKBLOM, B. Skeletal muscle metabolism during short duration high-intensity exercise: influence of creatine supplementation. Acta Physiologica Scandinavica, v.154, n.3, p.303-310, 1995.
BANGSBO, J.; JUEL, C. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.100, n.4, p.1412-1413, 2006.
BARNET, C.; HINDS, M.; JENKINS, D.J. Effects of oral creatine supplementation on multiple sprint cycle performance. Australian Journal of Science and
Medicine in Sport, v.28, n.1, p.35-39, 1996.
BASMAJIAN, J. e DE LUCA, C.J. Muscles Alive: Their functions revealed by
electromyography. 5ed. USA, 1985. 561p.
BATES, B.T.; OSTERNING, L.R.; JAMES, S.L. Fatigue effects in running. Journal of Motor Behavior, v.9, p.203-207, 1977.
BEMBEN, M.G.; LAMONT, H.S. Creatine supplementation and exercise performance: recent findings. Sports medicine, v.35, n.2, p.107-25, 2005.
BERGH, U.; EKBLOM, B.; ASTRAND, P.O. Maximal oxygen uptake “classical” versus “contemporary” viewpoints. Medicine and Science in Sports and
Exercise, v.32, n.1, p.85-88, 2000.
BIGLAND-RITCHIE, B.; DONOVAN, E.F.; ROUSSOS, C.S. Conduction velocity EMG power spectrum changes in fatigue of sustained maximal efforts. Jorurnal of
Applied Physiology, v.51, n.5, p.1300-1305, 1981.
BIGLAND-RITCHIE, B. e WOODS, J.J. Changes in muscle contractile properties and neural control during human muscular fatigue. Muscle e Nerve, v.7, p.691-699, 1984.
BILODEAU, M.; SCHINDLER-IVENS, S.; WILLIAMS, D.M.; CHANDRAN, R.; SHARMA, S.S. EMG frequency content changes with increasing force and during fatigue in the quadriceps femoris muscle of men and women. Journal of
Electromyography and Kinesiology, v.13, n.1, p.83-92, 2003.
BLACKMAN, R.B. e TUKEY, J.W. The Measurement of Power Spectra. Dover Publications, New York, 1958.
BOGDANIS, G.C.; NEVILL, M.E.; BOOBIS, L.H.; LAKOMY, H.K. Contribution of phosphocreatine and aerobic metabolism to energy supply during repeated sprint exercise. Journal of Applied Physiology, v.80, n.3, p.876-884, 1996. BORG, G. Escalas de Borg para a dor e o esforço percebido. São Paulo: Manole,
2000.
BORRANI, F.; CANDAU, R.; PERREY, S.; MILLET, G.Y.; MILLET, G.P.; ROUILLON, J.D. Does the mechanical work in running change during the VO2 slow component? Medicine and Science in Sports and Exercise, v.35, p.50-57 2003.
BOSCO, C. TIHANTI, J. PUCSPK, J.; KOVACS, I.; GABOSSY, A.; COLLI, R.; PULVIRENTI, G.; TRANQUILLI, C.; FOTI, C.; VIRU, M.; VIRU, A. Effect of oral creatine supplementation on jumping and running performance. International
Journal of Sports Medicine, v.18, p.369-372, 1997.
BOYER, K.A.; NIGG, B.M. Muscle activity in the leg is tuned in response to impact force characteristics. Journal of Biomechanics, v.37, n.10, p.1583-1588, 2004. BRANCH, J.D. Effect of creatine supplementation on body composition and performance: a meta-analysis. International Journal of Sport Nutrition and
Exercise Metabolism, v.13, n.3, p.198-226, 2006.
BROOKS, G.A. Current concepts in lactate exchange. Medicine and Science in
Sports and Exercise, v.23, n.8, p.895-906, 1991.
BROUNS, F., NIEUWENHOVEN, M.V., JEUKENDRUP, A, LICHTENBELT, W.V.M. Functional foods and food supplements for athletes: from myths to benefit claims substantiation through the study of selected biomarkers. British Journal of
Nutrition, v.88 (Suppl. 2), p.177-186, 2002.
BURKLE, L.M.; PYNE, D.B.; TELFORD, R.D. Effect of oral creatine supplementation on single-effort sprint performance in elite swimmers. International Journal of
Sports Nutrition, v.6, p.22-33, 1996.
BURNLEY, M.; WILKERSON, D.P.; JONES, A.M. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of
Applied Physiology, v.101, n.2, p.683, 2006.
CAIRNS, S.P. Lactic acid and exercise performance: culprit or friend? Sports
Medicine, v.36, n.4, p.279-291, 2006.
CARDOZO, A.C.; GONÇALVES, M. Electromyography fatigue threshold of erector spinae muscle induced by a muscular endurance test in health men.
Electromyography and Clinical Neurophysiology, v.43, n.6, p.377-380, 2003.
CARDOZO, A.C.; GONÇALVES, M. GAUGLITZ, A.C.F. Spectral analysis of the electromyography of the erector spinae before and after a dynamic manual load- lifting test. Brazilian Journal of Medical and Biological Research, v.37, p.1081-1085, 2004.
CASEY, A.; CONSTANTIN-TEODOSIU, D.; HOWELL, S.; HULTMAN, E.; GREENHAFF, P.L. Metabolic response of type I and II muscle fibers during repeated bouts of maximal exercise in humans. American Journal of
CAVANAGH, P.R.; KRAM, R. Stride length in distance running: velocity, body dimensions, and added mass effects. Medicine and Science in Sports and
Exercise, v.21, n.4, p.467-479, 1989.
CHRISTINA, K.A.; WHITE, S.C.; GILCHRIST, L.A. Effect of localized muscle fatigue on vertical ground reaction forces and ankle joint motion during running. Human
Movement Science, v.20, n.3, p.257-276, 2001.
COOGAN, A.R.; SWANSON, S.C. Nutritional manipulations before and during endurance exercise: effects on performance. Medicine and Science in Sports
and Exercise, v.24, n.9 (suplemento), p.331-335, 1992.
CORNISH, S.M.; CHILIBECK, P.D.; BURKE, D.G. The effect of creatine monohydrate supplementation on sprint skating in ice-hockey players. The Journal of Sports
Medicine and Physical Fitness, v.46, n.1, p.90-98, 2006.
DAVIS, J.A. Anaerobic threshold: review of the concept and directions for future research. Medicine and Science in Sports and Exercise, v.17, n.1, p.6-18, 1985.
DAVIS, M.; BAILEY, S. Possible mechanisms of central nervous system fatigue during exercise. Medicine and Science in Sports and Exercise, v.29, n.1, p.45-57, 1997.
DAWSON, B.; CUTLER, M.; MOODY, A.; LAWRENCE, S.; GOODMAN, C.; RANDALL, N. Effects of oral creatine loading on single and repeated maximal short sprints. Australian Journal of Science and Medicine in Sports, v.27, n.3, p.56-61, 1995.
DE LUCA, C. J. Decomposition of the EMG signal into constituent motor unit action potentials. Muscle and Nerve, v.18, n.12, p.1492-4, 1995.
DE LUCA, C. J. The use of surface electromyography in Biomechanics. Journal of
Applied Biomechanics, v. 13, n.3, p. 135-163, 1997.
DEMANT, T.W.; RHODES, E.C. Effects of creatine supplementation on exercise performance. Sports Medicine, v.28, n.1, p.49-60, 1999.
DE VRIES, H.A.; MORITANI, T.; NAGAT, A.; MAGNUSSEN, K. The relation between critical power and neuromuscular fatigue as estimated from electromyographic data. Ergonomics, v.25, n.9, p.783-791, 1982.
DERRICK, T.R.; DEREU, D.; MCLEAN, S.P. Impacts and kinematic adjustments during an exhaustive run. Medicine and Science in Sports and Exercise, v.34, n.6, p.998-1002, 2002.
DIAS DA SILVA, S.R., GONÇALVES, M. Análise da fadiga muscular pela amplitude do sinal eletromiográfico. Revista Brasileira de Ciência e Movimento, v.11, n.3, p.15-20, 2003.
DIAS DA SILVA, S.R., GONÇALVES, M. Dynamic and isometric protocols of the knee extension: effect of fatigue on the EMG signal. Electromyography and Clinical
Neurophysiology, v.46, n.1, p.35-42, 2006.
DICKINSON, J. A.; COOK, S. D.; LEINHARDT, T. M. The measurement of shock waves following heel strike while running. Journal of Biomechanics, v.18, n.6, p.415-422, 1985.
DUBOUCHAUD, H.; BUTTERFIELD, G.E.; WOLFEL, E.E.; BERGMAN, B.C.; BROOKS, G.A. Endurance training, expression, and physiology of LDH, MCT1, and MCT4 in human skeletal muscle. American Journal of Physiology and
Metabolism v.278, n.4, p.571-579, 2000.
DUTTO, D.J.; SMITH, G.A. Changes in spring-mass characteristics during treadmill running to exhaustion. Medicine and Science in Sports and Exercise, v.34, n.8, p.1324-1331, 2002.
ELLESTAD, M.H.; COOKE Jr, B.M.; GREENBERG, P.S. Stress testing: clinical application and predictive capacity. Progress in Cardiovascular Diseases, v.21, n.6, p.431-460, 1979.
ELLIOTT, B. C. e ROBERTS, A. D. A biomechanical evaluation of role of fatigue in middle-distance running. Canadian Journal of Applied Sports Science, v.5, n.4, p.203-207, 1980.
ENGELHARD, M.; NEUMANN, G.; BERBALK, A.; REUTER, I. creatine supplementation in endurance sports. Medicine and Science in sports and
Exercise, v.30, n.7, p.1123-1129, 1998.
ENGLE P C; JONES JB. Causes and elimination of erratic blanks in enzymatic metabolite assays involving the use of NAD in alkaline hydrazine buffers: improve conditions for the assay of L-glutamate, L-lactate, and other metabolites.
Analytical Biochemistry, 88:475-84, 1978.
ESPOSITO, F.; ORIZIO, C.; VEICSTEINAS, A. Electromyogram and mechanomyogram changes in fresh and fatigued muscle during sustained contraction in men. European Journal of Applied Physiology and
Occupational Physiology, v.78, n.6, p.494-501, 1998.
FRANKEL,V.H.; NORDIN, M. Basics Biomechanics of the Skeletal System. Lea e Febiger, Philadelphia,1980.
GANDEVIA, S. Spinal and supraspinal factors in human muscle fatigue.
Physiological Reviews 81 (4): 1725-1789, 2001.
GASTIN, P.B. Energy system interaction and relative contribution during maximal exercises. Sports Medicine, v.31, n.10, p.725-741, 2001.
GERLACH, K.E.; WHITE, S.C.; BURTON, H.W.; DORN, J.M.; LEDDY, J.J.; HORVATH, P.J. Kinetic changes with fatigue and relationship to injury in female runners. Medicine and Science in Sports and Exercise, v.37, n.4, p.657-663, 2005.
GIBSON, H. e EDWARDS, R.H. Muscular exercise and fatigue. Sports Medicine, v.2, n.2, p.120-32, 1985.
GLADDEN, L.B.; HOGAN, M.C. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.100, n.6, p.2100-2101, 2006.
GOTTSCHALL, J. S.; KRAM, R. Ground reaction forces during downhill and uphill running. Journal of Biomechanics, v.38, p. 445 – 452, 2005.
GREEN, H.J. Manifestation and sites of neuromuscular fatigue. Biochemistry of
Exercise, p.13-35, 1990.
GREENHAFF, P.L.; CASEY, A.; SHORT, A.H.; HARRIS, R.; SODERLUND, K.; HULTMAN, E. Influence of oral creatine supplementation of muscle torque during repeated bouts of maximal voluntary exercise in man. Clinical Science, v.84, n.5, p.565-571, 1993.
GREENHAFF, P.L.; BODIN, K.; SODERLUND, K.; HULTMAN, E. Effect of oral creatine supplementation on skeletal muscle phosphocreatine resynthesis.
American Journal of Physiology, v.266, n.5, p.725-730, 1994.
GUALANO, B.; BENATTI, F.B.; FERREIRA, J.C.B.; FRANCHINI, E.; BRUM, P.C.; LANCHA Jr, A.H. Efeitos da suplementação de creatina no exercício intermitente de alta intensidade: divergências e recomendações metodológicas.
Revista Brasileira de Cineantropometria e Desempenho Humano, v.10, n.2,
p.189-196, 2008.
HAKKINEN, K.; KOMI, P.V. Effects of fatigue and recovery on electromyographic and isometric force- and relaxation-time characteristics of human skeletal muscle.
European Journal Applied Physiology and Occupational Physiology, v.55,
n.6, p. 588–596, 1986.
HANON, C.; THÉPAUT-MATHIEU, C.; HAUSSWIRTH, C.; Le CHEVALIER, J.M. The electromyogram as an indicator of neuromuscular fatigue during incremental exercise. European Journal of Applied Physiology, v.78, p.315–323, 1998.
HANON, C.; THÉPAUT-MATHIEU, C.; VANDERWALLE, H. Determination of muscular fatigue in elite runners. European Journal of Applied Physiology, v.94, p.118-125, 2005.
HARRIS, R.; SODERLUND, K.; HULTMAN, E. Elevation of creatine in resting and exercised muscle of normal subjects by creatine supplementation. Clinical
Science, v.83, p.367-374, 1992.
HARY, D.; BELMAN, M.J.; PROPST, J.; LEWIS, S. A statistical analysis of the spectral moments used in EMG tests of endurance. Journal of Applied
Physiology, v.53, N.3, p.779-783, 1982.
HOFFMAN, J.R.; STOUT, J.R.; FALVO, M.J.; KANG, J.; RATAMESS, N.A. Effect of low-dose, short-duration creatine supplementation on anaerobic exercise performance. Journal of Strength and Conditioning Research, v.19, n.2, p.260-264, 2005.
HORITA, T.; KOMI, P.V.; NICOL, C.; KYRÖLÄINEN, H. Stretch-shortening cycle fatigue: interactions among joint stiffness, reflex, and muscle mechanical performance in the drop jump. European Journal of Applied Physiology, v.73, p.393-403, 1996.
HOUSH, T.J.; DE VRIES, H.A; JOHNSON, G.O.; EVANS, S.A.; HOUSH, D.J.; STOUT, J.R.; BRADWAY, R.M.; EVETOVICH, T.K. Neuromuscular fatigue threshold of the vastus lateralis, vastus medialis and rectus femoris muscles.
Electromyography and Clinical Neurophysiology, v.36, n.4, p.247-255, 1996.
HRELJAC, A.; MARSHAL, R.N.; HUME, P.A. Evaluation of lower extremity overuse injury potential in runners. Medicine and Science in Sports and Exercise, v.32, n.9, p.1635-1641, 2000.
HRELJAC, A. Impact and overuse injuries in runners. Medicine and Science in
Sports and Exercise, v.36, n.5, p.845-849, 2004.
JONES, A.M.; ATTER, T.; GEORG, K.P. Oral creatine supplementation improves multiple sprint performance in elite ice-hockey players. The Journal of Sports
Medicine and Physical Fitness, v.39, n.3, p.189-196, 1999.
JUEL, C.; HOLTEN, M.K.; DELA, F. Effects of strength training on muscle lactate release and MCT1 and MCT4 content in healthy and type 2 diabetic humans.
Journal of Physiology, v.556(Pt 1), p.297-304, 2004.
KEMP, G. Lactate accumulation, proton buffering, and pH change in ischemically exercising muscle. American Journal of Physiology. Regulatory, Integrative
KEMP, G.; BÖNING, D.; BENEKE, R.; MAASSEN, N. Explaining pH change in exercising muscle: lactic acid, proton consumption, and buffering vs. strong ion difference. American Journal of Physiology. Regulatory, Integrative and
Comparative Physiology, v.291, p.235-237, 2005.
KEY, D.; St CLAIR GIBSON, A.; MITCHELL, M.J.; LAMBERT, M.I.; NOAKES, T.D. Different neuromuscular recruitment patterns during eccentric, concentric and isometric contractions. Journal of Electromyography and Kinesiology, v.10, n.6, p.425-431, 2000.
KIIRÖLÄINEN, H.; KOMI, P.V. The function of neuromuscular system in maximal stretch-shortening cycle exercises: comparison between power and endurance- trained athletes. Journal of Electromyography Kinesiology, v.5, n.1, p.15-25, 1995.
KILDUFF, L.P.; VIDAKOVIC, P.; COONEY, G.; TWYCROSS-LEWIS, R.; AMUNA, P.; PARKER, M.; PAUL, L.; PITSILADIS, Y.P. Effects of creatine on isometric bench-press performance in resistance-trained humans. Medicine and Science
in Sports and Exercise, v.34, n.7, p.1176-1183, 2002.
KIRKENDALL, D.T. Mechanisms of peripheral fatigue. Medicine and Science in
Sports and Exercise, v.22, n.4, p.444-449, 1990.
KOMI, P.V. Stretch-shortening cycle a powerful model to study normal and fatigued muscle. Journal of Biomechanics, v.33, p.1197-1206, 2000.
KREIDER, R. B.; FERREIRA, M.; WILSON, M.; GRINDSTAFF, P.; PLISK, S.; REINARDY, J.; CANTLER, E.; ALMADA, A. L. Effects of creatine supplementation on body composition, strength, and sprint performance.
Medicine and Science in Sports and Exercise, v.30, n.1, p.73-82, 1998.
KUN E; KEARNEY EB. Ammonia. In: BERGMEYER, H. U., ed. Methods of
enzymatic analysis. London, Academic Press, 1983.
LAMB, G.D.; STEPHENSON, D.G. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.100, n.4, p.1410-1412, 2006.
LATTIER, G.; MILLET, G.Y.; MARTIN, A.; MARTIN, V. Fatigue and recovery after high-intensity exercise part I: neuromuscular fatigue. International Journal of
Sports Medicine, v.25, n.6, p.450-456, 2004a.
LATTIER, G.; MILLET, G.Y.; MARTIN, A.; MARTIN, V. Fatigue and recovery after high-intensity exercise part II: Recovery interventions. International Journal of
LEMON, P.W.R. Dietary Creatine Supplementation and Exercise Performance: Why Inconsistent Results? Canadian Journal of Applied Physiology, v.27, n.6, p.663-680, 2002.
LINDINGER, M.I. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.100, n.6, p.2100, 2006.
LINDINGER, M. I.; KOWALCHUK, J.M.; HEIGENHAUSER, G.J. Applying physicochemical principles to skeletal muscle acid-base status. American
Journal of Physiology. Regulatory, Integrative and Comparative Physiology, v.289, n.3, p.891-894, 2005.
MACLAREN, D.P.M.; GIBSON, H; PARRY-BILLINGS, M.; EDWARDS, R.H.T. A review of metabolic and physiological factors in fatigue. Exercise e Sports
Science Reviews, v.17, p.29-66, 1989.
MASUDA, K.; MASUDA, T.; SADOYAMA, T.; INAKI, M.; KATSUTA, S. Changes in surface EMG parameters during static and dynamic fatiguing contractions.
Journal of Electromyography and Kinesiology, v.9, n.1, p.39-46, 1999.
MATSUMOTO, T.; ITO, K.; MORITANI, T. The relationship between anaerobic threshold and electromyographic fatigue threshold in college women. European
Journal of Applied Physiology and Occupational Physiology, v.63, n.1, p.1-
5, 1991.
McCLAY, I.S.; LAKE, M.J.; CAVANAGH, P.R. Muscle activity in running. In: CAVANAGH, P.R., ed. Biomechanics of distance running. Champaign, Human Kinetics, 1990. p.165-186.
McLELLAN TM. Ventilatory and plasma lactate response with different exercise protocols: a comparison of methods. International Journal of Sports Medicine, 6: 30-5, 1985.
McLESTER, J.R. muscle contraction and fatigue: the role of adenosine 5’- diphosphate and inorganic phosphate. Sports Medicine, v.23, n.5, p.287-305, 1997.
MERCER, J.A.; BATES, B.T.; DUFEK, J.S.; HRELJAC, A. Characteristics of shock attenuation during fatigued running. Journal of Sports Sciences, v.21, n.11, p.911-919, 2003.
METZGER, J.M.; MOSS, R.L. Greater hydrogen ion-induced depression of tension and velocity in skinned single fibers of rat faster than slow muscles. Journal of
Physiology, v.393, p.727-742, 1987.
MORITANI, T.; de VRIES, H.A. Anaerobic threshold determination by surface electromyography. Medicine and Science in Sports and Exercise, v.12, p.86, 1980.
MORITANI, T.; ODDSON, L.; THORSTENSSON, A. Electromyographic evidence of selective fatigue during the eccentric phase of stretch/shortening cycles in man. European Journal Applied Physiology and Occupational Physiology, v.60, n.6, p.425-429, 1990.
MORITANI, T.; TAKAISHI, T.; MATSUMOTO, T. Determination of maximal power output at neuromuscular fatigue threshold. Journal of Applied Physiology, v.74, n.4, p.1729-1734, 1993.
MUJIKA, I.; CHATARD, J. LACOSTE, L.; BARALE, F.; GEYSSANT, A. Creatine supplementation does not improve sprint performance in competitive swimmers.
Medicine and Science in Sports and Exercise, v.28, n.11, p.1435-1441, 1996.
MUNRO, C.F.; MILLER; D.I.; FUGLEVAND, A.J. Ground reaction forces in running: a Reexamination. Journal of Biomechanics, v.20, n.2, p.147-155, 1987.
NAGATA, A.; MURO, M.; MORITANI, T.; YOSHIDA, T. Anaerobic threshold determination by blood lactate and myoelectric signals. The Japanese Journal
of Physiology, v.31, p.585–597, 1981.
NEWSHOLME, E.A., BOLMSTRAND, E., EKBLOM, B. Physical and mental fatigue: Metabolic mechanisms and importance of plasma amino acids. Britsh Medical
Bulletim, v.48, n.3, p.477-495, 1992.
NEWSHOLME, E.A., BLOMSTRAND, E. Branched-chain amino acids and central fatigue. The Journal of Nutrition, v.136 (suppl.), p.274-276, 2006.
NICOL, C.; KOMI, P. V.; MARCONNET, P. Fatigue effects of marathon running on neuromuscular performance I. Changes in muscle force and stiffness characteristics. Scandinavian Journal of Medicine and Science in Sports, v.1, p.10-17, 1991a.
NICOL, C.; KOMI, P.V.; MARCONNET, P. Fatigue effects of marathon running on neuromuscular performance II: changes in force, integrated electromyographic activity and endurance capacity. Scandinavian Journal of Medicine and
NIELSEN, O.B.; de PAOLI, F.; OVERGAARD, K. Protective effects of lactic acido in force production in rat skeletal muscle. Journal of Physiology, v.536, p.161- 166, 2001.
NIELSEN, O.B.; OVERGAARD, K. Point:couterpoint: Lactic acid accumulation is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.101, n.1, p.367, 2006.
NILSSON, J.; THORSTENSSON, A.; HALBERTSMA, J. Changes in leg movements and muscle activity with speed of locomotion and mode of progression in humans. Acta Physiologica Scandinavica, v.123, p.457-475, 1985.
NISSEN, S.L.; SHARP, R.L. Effect of dietary supplements on lean mass and strength gains with resistance exercise: a meta-analisys. Journal of Applied
Physiology, v.94, p.651-657, 2003.
NUMMELA, A; RUSKO, H; MERO, A. EMG activities and ground reaction forces during fatigued and nonfatigued sprinting. Medicine and Science in Sports and
Exercise, v.26, n.5, p.605-609, 1994.
NYBO, L.; MOLLER, K.; PEDERSEN, B.K.; NIELSEN, B.; SECHER, N.H. Association between fatigue and failure to preserve cerebral energy turnover during prolonged exercise. Acta Physiologica Scandinavica, v.179, n.1, p.67-74, 2003.
NYBO, L.; DALSGAARD, M.K.; STEENBERG, A.; MOLLER, K.; SECHER, N.H. Cerebral ammonia uptake and accumulation during prolonged exercise in humans. The Journal of Physiology, v.563, n.1, p.285-290, 2005.
NYLAND, J.A.; SHAPIRO, R.; STINE, R.L.; HORN, T.S.; IRELAND, M.L. Relationship of fatigued run and rapid stop to ground reaction forces, lower extremity kinematics, and muscle activation. Journal of Orthopaedic and Sports
Physical Therapy, v.20, n.3, p.132–137, 1994.
OLIVEIRA, A.S.C.; GONÇALVES, M.; CARDOZO, A.C.; BARBOSA, F.S.S. Electromyographic fatigue threshold of the biceps brachii muscle during dynamic contraction. Electromyography and Clinical Neurophysiology, v.45, p.167- 175, 2005.
PAAVOLAINEN, L.; NUMMELA, A.; RUSKO, H.; HÄKKINEN, K. Neuromuscular characteristics and fatigue during 10 km running. International Journal of
Sports Medicine, v.20, p.516-521, 1999.
PAPOULIS, A. Probability, Random Variables, and Stochastic Processes. McGraw Hill, Singapore, 2ed, 1984.
PARNIANPOUR, M.; NORDIN, M.; KAHANOVITZ, N.; FRANKEL, V. Volvo award in biomechanics. The triaxial coupling of torque generation of trunk muscles during isometric exertions and the effect of fatiguing isoinertial movements on the motor output and movement patterns. Spine, v.13, n.9, p.982–992, 1988.
PINNIGER, G.J.; STEELE, J.R.; GROELLER, H. Does fatigue induced by repeated dynamic efforts affect hamstring muscle function? Medicine and Science in
Sports and Exercise, v.32, n.3, p.647–653, 2000.
PLACE, N.; LEPERS, R.; DELEY, G. MILLET, GY. Time course of neuromuscular alteration during a prolongued running exercise. Medicine and Science in
Sports and Exrecise, v.36, n.8, p.1347-1356, 2004.
POTVIN, J.R. e BENT, R.L. A validation of techniques using surface EMG signals from dynamic contractions to quantify muscle fatigue during repetitive task.
Journal of Electromyography and Kinesiology, v.7, n.2, p.131-139, 1997.
PREEN, D.; DAWSON, B.; GOODMAN, C.; LAWRENCE, S.; BEILBY, J.; CHING, S. Pre-exercise oral creatine ingestion does not improve prolonged intermittent sprint exercise in humans. The Journal of Sports Medicine and Physical
Fitness, v.42, n.3, p.320-329, 2002.
RADIN, E.L. Role of muscles in protecting athletes from injury. Acta Medica
Scandinavica, Supplemento, 711, p.143–147, 1986.
ROBERGS, R.A.; GHIASVAND, F.; PARKER, D. Biochemistry of exercise-induced metabolic acidosis. American Journal of Physiology. Regulatory, Integrative
and Comparative Physiology, v.287, n.3, p.502-516, 2004.
ROSCHEL, H.; GUALANO, B.; MARQUEZI, M.; COSTA, A.; LANCHA, A.H. JR. Creatine supplementation spares muscle glycogen during high intensity intermittent exercise in rats. Journal of the International Society of Sports
Nutrition, v.7, n.6, p.1-7, 2010.
ROY, S.H.; De LUCA, C.J.; SCHNEIDER, J. Effects of electrode localization on myoeletric condution velocity and median frequency estimates. Journal
Applied Physiology, v.61. n.4, p.1510-1517, 1986.
SAHLIN, K. Point:couterpoint: Lactic acid accumulation. is an advantage/disadvantage during muscle activity. Journal of Applied Physiology, v.101, n.1, p.367, 2006.
SAHLIN, K.; REN, J.M. Relationship of contraction capacity to metabolic changes during recovery from a fatiguing contraction. Journal of Applied Physiology, v.67, p.648-654, 1989.
SERRÃO, J.C. Estudo do comportamento dinâmico da força de reação do solo em corredores induzidos à fadiga Rio Claro, 1996. 58p. Dissertação (Mestrado) – Instituto de Biociências, Universidade Estadual Paulista.
SEWELL, D.A.; ROBINSON, T.M.; GREENHAFF, P.L. Creatine supplementation does not affect human skeletal muscle glycogen content in the absence of prior exercise. Journal of Applied Physiology, v.104, p.508–512, 2008.
SILER, W. L. e MARTIN, P. E. Changes in running pattern during a treadmill run to volitional exhaustion: fast versus slower runners. International Journal of Sport
Biomechanics, v.7, p.12-28, 1991.
SILVA, S.R.D.; GONÇALVES, M. Análise da fadiga muscular pela amplitude do sinal eletromiográfico. Revista Brasileira de Ciência e Movimento, v.11, n.3, p.15-20, 2003.
SILVA, S.R.D.; GONÇALVES, M. AMADIO, A.C.; SERRÃO, J.C. Electromyographic interpretation of vastus medialis and vastus lateralis muscles fatigue in isometric contraction tests. Revista Brasileira de Biomecânica, v.6, p.35-40, 2005.
SILVA, P.B.; FRAGA, C.H.W.; SILVA, S.R.D.; CARDOZO, A.C.; GONÇALVES, M. EMG and kinematics analysis of an incremental running test. Proceedings
International Symposium of Biomechanics in Sport, 2007.
SJOGAARD, G.; ADAMS, R.P.; SALTIN, B. Water and ion shifts in skeletal muscle of humans with intense dynamic knee extension. American Journal of Physiology, v.284, p.190-196, 1985.
SKARE, O.C.; SKADBERG; WISNES, A.R. Creatine supplementation improves sprint performance in male sprinters. Scandinavian Journal of Medicine and
Science in Sports, v.11, n.2, p.96-102, 2001.
SKINNER, H.B.; WYATT, M.P.; HODGDON, J.A.; CONARD, D.W.; BARRACK, R.L. Effect of fatigue on joint position sense of the knee. Journal of Orthopaedic
Research, v.4, n.1, p.112–118, 1986.
SMITH, A.E.; WALTER, A.A.; HERDA, T.J.; RYAN, E.D.; MOON, J.R.; CRAMER, J.T. STOUT, J.R. Effects of creatine loading on electromyographic fatigue threshold during cycle ergometry in college-aged women. Journal of the International
Society of Sports Nutrition, v.26, p.4-20, 2007.