European Journal of Applied Physiology

, Volume 108, Issue 5, pp 927–934 | Cite as

Voluntary activation of the ankle plantar flexors following whole-body vibration

  • Michael J. Pellegrini
  • Noel D. Lythgo
  • David L. Morgan
  • Mary P. Galea
Original Article

Abstract

This study investigated the effect of whole-body vibration (WBV) on the voluntary activation of the ankle plantar flexors. Twelve healthy young adults were randomly exposed to two treatments on separate occasions. The first (non-WBV) involved stretching of the plantar flexors at end range of dorsiflexion for five 1-min bouts. The second involved the same stretch with WBV (26 Hz) for five 1-min bouts. Attempted maximal voluntary contractions (AMVCs) of the plantar flexors were performed on an isokinetic dynamometer (30° s−1) before and after each treatment. A twitch interpolation technique was used to investigate voluntary activation. Post-treatment data were normalised against pre-treatment data. Subjects were classified as maximally (n = 6) or sub-maximally (n = 6) activated using the pre-treatment twitch interpolation data. The effects of WBV were assessed by repeated measure (RM) MANOVA. After WBV, the group of subjects classified as sub-maximally activated increased peak voluntary torque and rate of voluntary torque production (P < 0.05), whereas angular displacement to peak torque reduced (P < 0.05); i.e. peak torque was produced at a longer muscle length. No significant non-WBV treatment effects were found for this group. No significant WBV effects were found for the group of subjects classified as maximally activated. This study found that the response to WBV was dependent on the level of voluntary activation of the ankle plantar flexors during a set of AMVCs.

Keywords

Dynamometer Isokinetic Torque Twitch interpolation Vibration Plantar flexors 

References

  1. Allen GM, Gandevia SC, McKenzie DK (1995) Reliability of measurements of muscle strength and voluntary activation using twitch interpolation. Muscle Nerve 18:593–600CrossRefPubMedGoogle Scholar
  2. Belanger AL, McComas AJ (1981) Extent of motor unit activation during effort. J Appl Physiol 51:1131–1135PubMedGoogle Scholar
  3. Bennell K, Talbot R, Wajswelner H, Techovanich W, Kelly D, Aj H (1998) Intra-rater and inter-rater reliability of a weight-bearing lunge measure of ankle dorsiflexion. Aust J Physiother 44:175–178PubMedGoogle Scholar
  4. Boone DC, Azen SP (1979) Normal range of motion of joints in male subjects. J Bone Joint Surg Am 61:756–759PubMedGoogle Scholar
  5. Bosco C, Colli R, Introini E, Cardinale M, Tsarpela O, Madella A, Tihanyi J, Viru A (1999) Adaptive responses of human skeletal muscle to vibration exposure. Clin Physiol 19:183–187CrossRefPubMedGoogle Scholar
  6. Cardinale M, Lim J (2003) The acute effects of two different whole body vibration frequencies on vertical jump performance. Med Sport 56:287–292Google Scholar
  7. Da Silva ME, Nuab VM, Vaamonde D, Fernandez JM, Poblador MS, Garcia-Manso JM, Lancho JL (2006) Effects of different frequencies of whole body vibration on muscular performance. Biol Sport 23:1–14Google Scholar
  8. De Gail P, Lance JW, Neilson PD (1966) Differential effects on tonic and phasic reflex mechanisms produced by vibration of muscles in man. J Neurol Neurosurg Psychiat 29:1–11CrossRefPubMedGoogle Scholar
  9. de Ruiter CJ, van der Linden RM, van der Zijden MJA, Hollander AP, de Haan A (2003) Short-term effects of whole-body vibration on maximal voluntary isometric knee extensor force and rate of force rise. Eur J Appl Physiol 88:472–475Google Scholar
  10. Eklund G, Hagbarth KE (1966) Normal variability of tonic vibration reflexes in man. Exp Neurol 16:80–92CrossRefPubMedGoogle Scholar
  11. Gandevia SC, McKenzie DK (1988) Activation of human muscles at short muscle lengths during maximal static effort. J Physiol 407:599–613PubMedGoogle Scholar
  12. Herbert RD, Gandevia SC (1999) Twitch interpolation in human muscles: mechanisms and implications for measurement of voluntary action. J Neurophysiol 82:2271–2283PubMedGoogle Scholar
  13. Kemertzis M, Lythgo N, Morgan D, Galea M (2008) Human plantar flexors respond to whole-body vibration by changing optimum length. Med Sci Sports Exerc 40:1977–1983CrossRefPubMedGoogle Scholar
  14. Konrad P (2005) The ABC of EMG: a practical introduction to kinesiological electromyography. Noraxon INC, Scottsdale, USAGoogle Scholar
  15. Maffiuletti NA, Pensini M, Martin A (2002) Activation of human plantar flexor muscles increases after electromyostimulation training. J Appl Physiol 92:1383–1392PubMedGoogle Scholar
  16. Merton PA (1954) Voluntary strength and muscle fatigue. J Physiol 123:553–564PubMedGoogle Scholar
  17. Rittweger J, Beller G, Felsenberg D (2000) Acute physiological effects of exhaustive whole-body vibration exercise in man. Clin Physiol 20:134–142CrossRefPubMedGoogle Scholar
  18. Rittweger J, Ehrig J, Just K, Mutschelknauss M, Kirsch KA, Felsenberg D (2002) Oxygen uptake in whole-body vibration exercise: influence of vibration frequency, amplitude, and external load. Int J Sports Med 23:428–432CrossRefPubMedGoogle Scholar
  19. Romaiguere P, Vedel JP, Pagni S (1993) Effects of tonic vibration reflex on motor unit recruitment in human wrist extensor muscles. Brain Res 602:32–40CrossRefPubMedGoogle Scholar
  20. Russo CR, Lauretani F, Bandinelli S, Bartali B, Cavazzini C, Guralnik JM, Ferrucci L (2003) High-frequency vibration training increases muscle power in postmenopausal women. Arch Phys Med Rehabil 84:1854–1857CrossRefPubMedGoogle Scholar
  21. Savelberg H, Keizer H, Meijer K (2007) Whole-body vibration induced adaptation in knee extensors: consequences of initial strength, vibration frequency, and joint angle. J Strength Cond Res 21:589–593CrossRefPubMedGoogle Scholar
  22. T’Jonck L, Lysens R, Witvrouw E, Hulens M, Delvaux K, Peers K (1997) The effect of positioning, sex and leg dominance on the plantar and dorsal flexors strength at the ankle. Isokinetics Exerc Sci 6:235–241Google Scholar
  23. Thelen DG, Wojcik LA, Schultz AB, Ashton-Miller JA, Alexander NB (1997) Age differences in using a rapid step to regain balance during a forward fall. J Gerontol Med Sci 52A:M8–M13Google Scholar
  24. Tihanyi TK, Horvath M, Fazekas G, Hortobagyi T, Tihanyi J (2007) One session of whole body vibration increases voluntary muscle strength transiently in patients with stroke. Clin Rehabil 21:782–793CrossRefPubMedGoogle Scholar
  25. Torvinen S, Kannu P, Sievanen H, Jarvinen TA, Pasanen M, Kontulainen S, Jarvinen TL, Jarvinen M, Oja P, Vuori I (2002) Effect of a vibration exposure on muscular performance and body balance. Randomized cross-over study. Clin Physiol Funct Imag 22:145–152CrossRefGoogle Scholar
  26. Wojcik LA, Thelen DG, Schultz AB, Ashton-Miller JA, Alexander NB (1999) Age and gender differences in single-step recovery from a forward fall. J Gerontol Med Sci 54A:M44–M50Google Scholar

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Michael J. Pellegrini
    • 1
  • Noel D. Lythgo
    • 1
    • 2
  • David L. Morgan
    • 1
  • Mary P. Galea
    • 1
  1. 1.Rehabilitation Sciences Research CentreUniversity of MelbourneParkvilleAustralia
  2. 2.Rehabilitation Sciences Research CentreUniversity of MelbourneKewAustralia

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