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Revista Portuguesa de Ciências do Desporto

versão impressa ISSN 1645-0523

Rev. Port. Cien. Desp. v.8 n.3 Porto dez. 2008

 

Respostas eletromiográficas induzidas pelo isolamento e pela imersão sobre os eletrodos de superfície.

 

Cristine L. Alberton

Eduardo M. Silva

Eduardo L. Cadore

Marcelo Coertjens

Paulo O. Beyer

Luiz F. Marocco

Luiz F. M. Kruel

Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil

 

 

RESUMO

O objetivo do presente estudo foi verificar alterações no sinal eletromiográfico (EMG) durante contrações isométricas realizadas nos meios aquático e terrestre. Oito mulheres (23 ± 1 anos) realizaram contrações isométricas voluntárias máximas em um dinamômetro isocinético para o registro do pico do torque dos extensores do joelho e do sinal EMG do músculo vasto lateral (flexão do joelho em 90°) com e sem isolamento sobre os eletrodos de superfície. Em seguida, outra contração voluntária máxima foi realizada contra resistência fixa nos meios terrestre e aquático. Para a análise estatística utilizou-se o Teste T pareado, com a=0,05 (SPSS versão 11.0). Nenhuma diferença significativa foi encontrada entre os valores rmsEMG para o vasto lateral nas situações com (0,560 ± 0,118 mV) e sem (0,538 ± 0,110 mV) isolamento (p=0,306), para valores de pico de torque similares (p=0,191). Os mesmos resultados foram encontrados comparando os meios terrestre (0,428 ± 0,054 mV) e aquático (0,388 ± 0,105 mV) (p=0,446). O uso de adesivos resistentes à água não alterou o sinal EMG. Além disso, não houve diferenças nos valores rmsEMG durante a contração voluntária máxima realizada nos meios aquático e terrestre, sugerindo que o meio não influenciou a amplitude do rmsEMG.

Palavras-chave: Eletromiografia, imersão, isolamento.

 

 

ABSTRACT

Electromiographic responses induced by superficial electrodes isolation and by immersion.

The objective of the present study was to verify the electromiographic (EMG) signal alterations during isometric actions performed in water and on land. Firstly, 8 women (23 ± 1 yrs) performed maximal voluntary isometric actions in a isokinetic dynamometer to record the peak torque for knee extensors and the EMG signal of the vastus lateralis muscle (90° knee flexion) with and without superficial electrodes isolation. Subsequently, another maximal isometric action was performed against fixed resistance on land and in water immersion. For statistical analysis a paired T-Test was used, with a=0.05 (SPSS vs 11.0). No significant difference was found between vastus lateralis rmsEMG values for situations with (0.560 ± 0.118 mV) and without (0.538 ± 0.110 mV) isolation (p=0.306), for similar peak torque values (p=0.191). The same results were found comparing on land (0.428 ± 0.054mV) and in water immersion (0.388 ± 0.105 mV) situations (p=0.446). The water-resistant adhesive taping did not alter the EMG signal. Based in this finding, we found no differences on rmsEMG values during maximal isometric actions performed both in water and on land, suggesting that the environment did not influence the rmsEMG amplitude.

Key-words: Electromyography, immersion, isolation

 

 

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REFERÊNCIAS

 

1. Alberton CL, Black GL, Vendrusculo AP, Brentano MA, Borges Jr NG, Kruel LFM (2006). Muscle activation in water exercise: Agonist and antagonist action with or without resitive equipment. Rev Port Cienc Desp 6(Supl.1): 71.         [ Links ]

2. Barela AMF, Stolf SF, Duarte M (2006). Biomechanical characteristics of adults walking in shallow water and on land. J Electromyogr Kinesiol 16: 250-256.

3. Basmajian JV, DeLuca CJ (1985). Muscle Alive: their function revealed by electromyography. Baltimore: Williams & Wilkins.

4. Benfield RD, Newton ER, Hortobágyi T (2007). Waterproofing EMG instrumentation. Biol Res Nurs 8(3): 195-201.

5. Chevutschi A, Lensel G, Vaast D, Thevenon A (2007). An electromyographic study of human gait both in water and on dry ground. J Physiol Anthropol Appl Human Sci 26(4): 467-473.

6. Clarys JP (1985). Hydrodynamics and electromyography: ergonomics aspects in aquatics. Appl Ergon 16(1): 11-24.

7. DeLuca CJ (1997). The use of surface electromyography in biomechanics. J Appl Biomec 13: 135-163.

8. Figueiredo PAP, Borges Jr NG, Tartaruga LAP, Kruel LFM (2006). Methodology of isolate the system to collect EMG signal in the water. AEA Aquatic Fitness Journal 3(1): 32.

9. Fujisawa H, Suenaga N, Minami A (1998). Electromyographic study during isometric exercise of the shoulder in head-out water immersion. J Shoulder Elbow Surg 7: 491-494.

10. Heyward VH, Stolarczyc LM (2000). Avaliação da composição corporal aplicada. São Paulo: Manole.

11. Jackson AS, Pollock ML, Ward A (1980). Generalized equations for predicting body density of women. Med Sci Sports Exerc 12: 175-182.

12. Kaneda K, Wakabayashi H, Sato D, Nomura T (2007). Lower extremity muscle activity during different types and speeds of underwater movement. J Physiol Anthropol 26(2): 197-200.

13. Kelly BT, Roskin LA, Kirkendall DT, Speer KP (2000). Shoulder muscle activation during aquatic and dry land exercises in nonimpaired subjects. J Orthop Sports Phys Ther 30(4): 204-210.

14. Masumoto K, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2004). Electromyigraphic analysis of walking in water in healthy humans. J Physiol Anthropol Appl Human Sci 23(4): 119-127.

15. Masumoto K, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2005). Muscle activity and heart rate response during backward walking in water and on dry land. Eur J Appl Physiol 94: 54-61.

16. Masumoto K, Shono T, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2007). Age-related differences in muscle activity, stride frequency and heart rate response during walking in water. J Electromyogr Kinesiol 17: 596-604.

17. Miyoshi T, Shirota T, Yamamoto S, Nakazawa K, Akai M (2004). Effect of the walking speed to the lower limb joint angular displacements, joint moments and ground reaction forces during walking in water. Disabil Rehabil 26(12): 724- 732.

18. Müller ESM, Black GL, Figueiredo PP, Kruel LFM, Hanish C, Appell HJ (2005). Comparação eletromiográfica do exercício abdominal dentro e fora da água. Rev Port Cienc Desp 5(3): 255-265.

19. Narici MV, Roi GS, Landoni L, Minetti AE, Cerretelli P (1989). Changes in force, cross-sectional area and neural activation during strenght training and detraining of the human quadriceps. Eur J Appl Physiol 59: 310-319.

20. Pinciviero DM, Green RC, Mark JD, Campy RM (2000). Gender and muscle differences in EMG amplitude and median frequency, and variability during maximal voluntary contractions of the quadriceps femoris. J Electromyogr Kinesiol 10:189-196.

21.Alberton CL, Black GL, Vendrusculo AP, Brentano MA, Borges Jr NG, Kruel LFM (2006). Muscle activation in water exercise: Agonist and antagonist action with or without resitive equipment. Rev Port Cienc Desp 6(Supl.1):71.

22.Barela AMF, Stolf SF, Duarte M (2006). Biomechanical characteristics of adults walking in shallow water and on land. J Electromyogr Kinesiol 16: 250-256.

23.Basmajian JV, DeLuca CJ (1985). Muscle Alive: their function revealed by electromyography. Baltimore: Williams & Wilkins.

24.Benfield RD, Newton ER, Hortobágyi T (2007). Waterproofing EMG instrumentation. Biol Res Nurs 8(3): 195-201.

25.Chevutschi A, Lensel G, Vaast D, Thevenon A (2007). An electromyographic study of human gait both in water and on dry ground. J Physiol Anthropol Appl Human Sci 26(4): 467-473.

26.Clarys JP (1985). Hydrodynamics and electromyography: ergonomics aspects in aquatics. Appl Ergon 16(1): 11-24.

27.DeLuca CJ (1997). The use of surface electromyography in biomechanics. J Appl Biomec 13: 135-163.

28.Figueiredo PAP, Borges Jr NG, Tartaruga LAP, Kruel LFM (2006). Methodology of isolate the system to collect EMG signal in the water. AEA Aquatic Fitness Journal 3(1): 32.

29.Fujisawa H, Suenaga N, Minami A (1998). Electromyographic study during isometric exercise of the shoulder in head-out water immersion. J Shoulder Elbow Surg 7: 491-494.

30.Heyward VH, Stolarczyc LM (2000). Avaliação da composição corporal aplicada. São Paulo: Manole.

31.Jackson AS, Pollock ML, Ward A (1980). Generalized equations for predicting body density of women. Med Sci Sports Exerc 12: 175-182.

32.Kaneda K, Wakabayashi H, Sato D, Nomura T (2007). Lower extremity muscle activity during different types and speeds of underwater movement. J Physiol Anthropol 26(2): 197-200.

33.Kelly BT, Roskin LA, Kirkendall DT, Speer KP (2000). Shoulder muscle activation during aquatic and dry land exercises in nonimpaired subjects. J Orthop Sports Phys Ther 30(4): 204-210.

34.Masumoto K, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2004). Electromyigraphic analysis of walking in water in healthy humans. J Physiol Anthropol Appl Human Sci 23(4): 119-127.

35.Masumoto K, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2005). Muscle activity and heart rate response during backward walking in water and on dry land. Eur J Appl Physiol 94: 54-61.

36.Masumoto K, Shono T, Takasugi S, Hotta N, Fujishima K, Iwamoto Y (2007). Age-related differences in muscle activity, stride frequency and heart rate response during walking in water. J Electromyogr Kinesiol 17: 596-604.

37.Miyoshi T, Shirota T, Yamamoto S, Nakazawa K, Akai M (2004). Effect of the walking speed to the lower limb joint angular displacements, joint moments and ground reaction forces during walking in water. Disabil Rehabil 26(12): 724-732.

38.Müller ESM, Black GL, Figueiredo PP, Kruel LFM, Hanish C, Appell HJ (2005). Comparação eletromiográfica do exercício abdominal dentro e fora da água. Rev Port Cienc Desp 5(3): 255-265.

39.Narici MV, Roi GS, Landoni L, Minetti AE, Cerretelli P (1989). Changes in force, cross-sectional area and neural activation during strenght training and detraining of the human quadriceps. Eur J Appl Physiol 59: 310-319.

40.Pinciviero DM, Green RC, Mark JD, Campy RM (2000). Gender and muscle differences in EMG amplitude and median frequency, and variability during maximal voluntary contractions of the quadriceps femoris. J Electromyogr Kinesiol 10:189-196.

41.Pink M, Perry J, Browne A, Scovazzo ML, Kerrigan J (1991). The normal shoulder during freestyle swimming: An electromyographic and cinematographic analysis of twelve muscles. Am J Sports Med 19(6): 569-576.

42.Pöyhönen T, Keskinen KL, Hautala A, Savolainen J, Mälkiä E (1999). Human isometric force production and electromyogram activity of knee extensor muscles in water and on dry land. Eur J Appl Physiol 80: 52-56.

43.Pöyhönen T, Kyrolainen H, Keskinen KL, Hautala A, Savolainen J, Mälkiä E (2001a). Neuromuscular function during therapeutic knee exercise under water and on dry land. Arch Phys Med Rehabil 82: 1446-1452.

44.Pöyhönen T, Kyrolainen H, Keskinen KL, Hautala A, Savolainen J, Mälkiä E (2001b). Electromyographic and kinematic analysis of therapeutic knee exercises under water. Clin Biomech 16: 496-504.

45.Pöyhönen T, Avela J (2002). Effect of head-out water immersion on neuromuscular function of the plantar flexores muscles. Aviat Space Environ Med 73(12): 1215-1218.

46.Rainoldi A, Cescon C, Bottin A, Casale R, Caruso I (2004a). Surface EMG alterations induced by underwater recording. J Electromyogr Kinesiol 14: 325-331.

47.Rainoldi A, Melchiorri G, Caruso I (2004b). A method for positioning electrodes during surface EMG recordings in lower limb muscles. J Neurosci Methods 134: 37-43.

48.Ruwe PA, Pink M, Jobe FW, Perry J, Scovazzo ML (1994). The normal and the painful shoulders during the breaststoke: Electromyographic and cinematographic analysis of twelve muscles. Am J Sports Med 22(6): 789-796.

49.Shono T, Masumoto K, Fujishima K, Hotta N, Ogaki T, Adachi T (2007). Gait patterns and muscle activity in the lower extremities of elderly women during underwater treadmill walking against water flow. J Physiol Anthropol Appl Human Sci 26(6): 579-586.

50.Veneziano WH, Rocha AF, Gonçalves CA, Pena AG, Carmo JC, Nascimento FAO, Rainoldi A (2006). Confounding factors in water EMG recordings: an approach to a definitive standard. Med Biol Eng Comput 44: 348-351.

 

 

CORRESPONDÊNCIA

Cristine Lima Alberton

Grupo de Pesquisa em Atividades Aquáticas e Terrestres

Laboratório de Pesquisa do Exercício, Escola de Educação Física – Universidade Federal do Rio Grande do Sul

Rua Felizardo, 750 – Bairro Jardim Botânico – CEP 90690-200 – Porto Alegre/RS.

Telefone: 0055 (51) 3308-5820

E-mail: tinialberton@yahoo.com.br