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Effects of Inspiratory Muscle Training on Resistance to Fatigue of Respiratory Muscles During Exhaustive Exercise

  • M. O. SegizbaevaEmail author
  • N. N. Timofeev
  • Zh. A. Donina
  • E. N. Kur’yanovich
  • N. P. Aleksandrova
Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 840)

Abstract

The aim of this study was to assess the effect of inspiratory muscle training (IMT) on resistance to fatigue of the diaphragm (D), parasternal (PS), sternocleidomastoid (SCM) and scalene (SC) muscles in healthy humans during exhaustive exercise. Daily inspiratory muscle strength training was performed for 3 weeks in 10 male subjects (at a pressure threshold load of 60 % of maximal inspiratory pressure (MIP) for the first week, 70 % of MIP for the second week, and 80 % of MIP for the third week). Before and after training, subjects performed an incremental cycle test to exhaustion. Maximal inspiratory pressure and EMG-analysis served as indices of inspiratory muscle fatigue assessment. The before-to-after exercise decreases in MIP and centroid frequency (fc) of the EMG (D, PS, SCM, and SC) power spectrum (P < 0.05) were observed in all subjects before the IMT intervention. Such changes were absent after the IMT. The study found that in healthy subjects, IMT results in significant increase in MIP (+18 %), a delay of inspiratory muscle fatigue during exhaustive exercise, and a significant improvement in maximal work performance. We conclude that the IMT elicits resistance to the development of inspiratory muscles fatigue during high-intensity exercise.

Keywords

Diaphragm EMG Inspiratory muscle fatigue Parasternal Scalene Sternocleidomastoid 

Notes

Conflicts of Interest

The authors declare no conflicts of interest in relation to this article.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • M. O. Segizbaeva
    • 1
    Email author
  • N. N. Timofeev
    • 2
  • Zh. A. Donina
    • 3
  • E. N. Kur’yanovich
    • 2
  • N. P. Aleksandrova
    • 3
  1. 1.Laboratory of Respiration Physiology, I.P. Pavlov Institute of PhysiologyRussian Academy of ScienceSaint PetersburgRussia
  2. 2.Department of Natural SciencesMilitary Sport InstituteSaint PetersburgRussia
  3. 3.I.P. Pavlov Institute of PhysiologyRussian Academy of ScienceSaint PetersburgRussia

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