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Int J Sports Med 1999; 20(8): 542-547
DOI: 10.1055/s-1999-9464
Training and Testing
Georg Thieme Verlag Stuttgart ·New York

The Influence of Prior Activity Upon Inspiratory Muscle Strength in Rowers and Non-Rowers

 S. Volianitis1 ,  A. K. McConnell1 ,  Y. Koutedakis2 ,  D. A. Jones1
  • 1 School of Sport and Exercise Sciences, The University of Birmingham, Birmingham, United Kingdom
  • 2 School of Health Sciences, The University of Wolverhampton, Wolverhampton, United Kingdom
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Publication History

Publication Date:
31 December 1999 (online)

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The aim of this study was to investigate whether a ’warm-up’ phenomenon in the strength of the inspiratory muscles exists, and, under this assumption, whether whole body warm-up protocols or a specific respiratory warm-up is more effective in this respect. Eleven club level rowers performed a rowing warm-up, and twelve university students performed a general cycling warm-up. Both groups also performed a specific respiratory warm-up. Inspiratory muscle strength (Mueller manoeuvre) and lung function (flow-volume loops) were measured before and after the three conditions. Isokinetic strength during knee extension was measured before and after the rowing warm-up. The two whole body warm-up protocols had no effect on inspiratory muscle strength or any lung function parameter despite the significant (3.8 ± SD 1.4 %; p < 0.05) increase in peak torque that the rowing warm-up elicited. The respiratory warm-up induced a significant increase in inspiratory mouth pressure (8.5 ± 1.8 %; p < 0.0001) but not in any other lung function parameter. Following the rowing incremental test to exhaustion, maximum inspiratory pressure decreased by 7.0 ± 2.0 %, which is an indication of respiratory muscle fatigue. These data suggest that the inspiratory muscle strength can be enhanced with preliminary activity, a phenomenon similar to the one known to exist for other skeletal muscles. In addition, a specific respiratory warm-up is more effective in this respect than whole body protocols.

Key words:

Warm-up - rowing - Mueller manoeuvre - inspiratory muscles - isokinetic strength

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Stefanos Volianitis

Sport Medicine and Human Performance Unit School of Sport and Exercise Sciences University of Birmingham

Edgbaston

Birmingham B15 2TT

United Kingdom

Phone: +44 (121) 4147379

Fax: +44 (121) 4144764

Email: Stefanos.Volianitis@mailexcite.com