TITLE

The effect of inspiratory muscle training on high-intensity, intermittent running performance to exhaustion

AUTHOR(S)
Tom Kwokkeung Tong; Frank Hokin Fu; Pak Kwong Chung; Eston, Roger; Kui Lu; Binh Quach; Jinlei Nie; So, Raymond
PUB. DATE
August 2008
SOURCE
Applied Physiology, Nutrition & Metabolism;Aug2008, Vol. 33 Issue 4, p671
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effects of inspiratory muscle (IM) training on maximal 20 m shuttle run performance (Ex) during Yo-Yo intermittent recovery test and on the physiological and perceptual responses to the running test were examined. Thirty men were randomly allocated to 1 of 3 groups. The experimental group underwent a 6 week pressure threshold IM training program by performing 30 inspiratory efforts twice daily, 6 d/week, against a load equivalent to 50% maximal static inspiratory pressure. The placebo group performed the same training procedure but with a minimal inspiratory load. The control group received no training. In post-intervention assessments, IM function was enhanced by >30% in the experimental group. The Ex was improved by 16.3% ± 3.9%, while the rate of increase in intensity of breathlessness (RPB/4i) was reduced by 11.0% ± 6.2%. Further, the whole-body metabolic stress reflected by the accumulations of plasma ammonia, uric acid, and blood lactate during the Yo-Yo test at the same absolute intensity was attenuated. For the control and placebo groups, no significant change in these variables was observed. In comparison with previous observations that the reduced RPB/4i resulting from IM warm-up was the major reason for improved Ex, the reduced RPB/4i resulting from the IM training program was lower despite the greater enhancement of IM function, whereas improvement in Ex was similar. Such findings suggest that although both IM training and warm-up improve the tolerance of intense intermittent exercise, the underlying mechanisms may be different. Dans cette étude, nous analysons l’effet de l’entraînement des muscles de l’inspiration (IM) sur le nombre de répétitions d’une course de 20 m (Ex) au cours du test Yo-Yo constitué de périodes intermittentes de récupération ; au cours de l’épreuve de course, on évalue aussi les ajustements physiologiques et perceptuels. Trente sujets sont répartis aléatoirement dans l’un des trois groupes : le groupe expérimental participe à un entraînement des muscles de l’inspiration d’une durée de six semaines consistant en 30 inspirations exécutées deux fois par jour, 6 fois par semaine à un seuil de pression équivalant à 50 % de la pression statique maximale observée au cours de l’inspiration. Le groupe placebo fait le même entraînement, mais contre une résistance minimale à l’inspiration et le groupe de contrôle de s’entraîne pas. À la suite du programme d’entraînement, on observe une amélioration de la fonction IM de plus 30 % chez le groupe expérimental. Le nombre de répétitions d’une course de 20 m augmente de 16,3 % ± 3,9 % et la vitesse de l’installation de la sensation d’essoufflement (RPB/4i) diminue de 11,0 % ± 6,2 %. De plus, on observe une diminution du stress métabolique global de l’organisme comme le révèlent les valeurs des concentrations plasmatiques d’ammoniac, d’acide urique et des concentrations sanguines de lactate au cours du test Yo-Yo réalisé à la même intensité absolue de travail. On n’observe aucune modification significative des valeurs de ces variables chez les deux autres groupes. Dans une étude antérieure, les auteurs ont observé que l’augmentation de Ex était due à la diminution de RPB/4i causée par l’échauffement des muscles de l’inspiration. Dans cette étude, on observe une moins grande diminution de RPB/4i et ce, même en présence d’une plus grande amélioration de la fonction IM et d’une même amélioration de Ex. D’après ces observations, l’entraînement et l’échauffement des muscles de l’inspiration améliorent la tolérance à la fatigue au cours d’un vigoureux exercice intermittent, mais les mécanismes semblent différents.
ACCESSION #
33379713

 

Related Articles

  • BÄ–GIMO GREIÄŒIO IR LAIPIOJIMO SUKELTO NUOVARGIO POVEIKIS AEROBININKIŲ KOJŲ RAUMENŲ EMG RODIKLIAMS. Zaičenkovienė, Kristina; Stasiulis, Arvydas; Paknys, Darius; Daniusevičiūtė, Laura; Ramanauskienė, Irina; Aleksandravičienė, Roma // Education. Physical Training. Sport;2010, Vol. 77 Issue 2, p105 

    The aim of the study was to determine the influence of running speed and fatigue induced by prior step exercise on the electrical activity of leg muscles during increasing exercise. Five aerobic students aged 22.8 ± 4.6) years, body weight 55.1 ± 5.1 kg and height 1.64 ± 0.03) of the...

  • On issues of confidence in determining the time constant for oxygen uptake kinetics. Markovitz, G. H.; Sayre, J. W.; Storer, I. W.; Cooper, C. B. // British Journal of Sports Medicine;Oct2004, Vol. 38 Issue 5, p553 

    Background: Ï„&Vdot;o2 at the onset of constant work rote (CWR) exercise is a variable of aerobic fitness that shortens with physical training and lengthens with cardiopulmonary disease. Determination of Ï„&Vdot;o2 with sufficiently high confidence has typically required multiple exercise...

  • Aerobic conditioning effects on substrate responses during graded cycling in pregnancy. Wolfe, Larry A.; Heenan, Aaron P.; Bonen, Arend // Canadian Journal of Physiology & Pharmacology;Jul2003, Vol. 81 Issue 7, p696 

    This study was conducted to test the hypothesis that aerobic conditioning prevents exercise-induced hypoglycemia and preserves the capacity to utilize carbohydrates and to produce lactate during heavy exercise in late gestation. The effects of closely monitored cycle ergometer conditioning...

  • STRENGTH TRAINING AND AEROBIC EXERCISE: COMPARISON AND CONTRAST. Knuttgen, Howard G. // Journal of Strength & Conditioning Research (Allen Press Publish;Aug2007, Vol. 21 Issue 3, p973 

    Most exercise programs for conditioning and rehabilitation are oriented to strength development, aerobic (cardiovascular) fitness, or a combination of the 2. Because the 2 types of exercise are located at the opposite extremes of a muscular power continuum, the design of a program must be highly...

  • Do weights and step mix? Vogel, Amanda // Shape;May2003, Vol. 22 Issue 9, p116 

    Reports that the women aged 21 to 51 years who used light ankle and hand weights during step aerobics three times a week showed no muscle-strength increases at the end of the 12-week study.

  • A PHYSIOLOGICAL APPRAISAL OF AEROBIC RIDING IN WOMEN. Khan, Shamim; Peters, Edith M. // Journal of Strength & Conditioning Research (Allen Press Publish;Aug2004, Vol. 18 Issue 3, p416 

    The aim of this study was to compare selected acute cardiorespiratory and metabolic effects of exercise on a Fitness Flyer (FF) aerobic rider to those of treadmill (TM) running. Fourteen women, aged 23-35 years, performed incremental exercise tests to exhaustion on the TM and FF. Ratings of...

  • Lactate threshold responses to a season of professional British youth soccer. McMillan, K.; Helgerud, J.; Grant, S. J.; Newell, J.; Wilson, J.; MacDonald, R.; Hoff, J. // British Journal of Sports Medicine;Jul2005, Vol. 39 Issue 7, p432 

    Objective: To examine the changes in aerobic endurance performance of professional youth soccer players throughout the soccer season. Methods: Nine youth soccer players were tested at six different time points throughout the soccer season by sub-maxima! blood lactate assessment, using an...

  • Influence of different rest intervals during active or passive recovery on repeated sprint swimming performance. Toubekis, Argyris; Douda, Helen; Tokmakidis, Savvas // European Journal of Applied Physiology;Feb2005, Vol. 93 Issue 5/6, p694 

    The purpose of this study was to investigate the effect of active or passive recovery after two different rest intervals on performance during repeated bouts of maximal swimming exercise. Sixteen swimmers (eight males and eight females) performed four trials in a counterbalanced order. Eight...

  • Effect of exercise-induced muscle damage on ventilatory and perceived exertion responses to moderate and severe intensity cycle exercise. Davies, Rosemary C.; Rowlands, Ann V.; Eston, Roger G. // European Journal of Applied Physiology;Sep2009, Vol. 107 Issue 1, p11 

    This study examined the effect of exercise-induced muscle damage (EIMD) on ventilatory and perceived exertion responses to cycle exercise. Ten healthy, physically active men cycled for 6 min at moderate intensity and to exhaustion at severe intensity before and 48 h after eccentric exercise (100...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics