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Title: | Assessment of maximum inspiratory pressure: Prior submaximal respiratory muscle activity (‘warm-up’) enhances maximum inspiratory activity and attenuates the learning effect of repeated measurement |
Authors: | Volianitis, S McConnell, AK Jones, DA |
Keywords: | Maximal inspiratory pressure;Respiratory warm-up;Learning effect |
Issue Date: | 2001 |
Publisher: | Karger |
Citation: | Respiration 68(1): 22-27, Jan 2001 |
Abstract: | Background: The variability of maximal inspiratory pressure (PImax) in response to repeated measurement affects its reliability; published studies have used between three and twenty PImax measurements on a single occasion. Objective: This study investigated the influence of a specific respiratory ‘warm-up’ upon the repeated measurement of inspiratory muscle strength and attempts to establish a procedure by which PImax can be assessed with maximum reliability using the smallest number of manoeuvres. Methods: Fourteen healthy subjects, familiar with the Mueller manoeuvre, were studied. The influence of repeated testing on a single occasion was assessed using an 18-measurement protocol. Using a randomised cross-over design, subjects performed the protocol, preceded by a specific respiratory warm-up (RWU) and on another occasion, without any preliminary activity (control). Comparisons were made amongst ‘baseline’ (best of the first 3 measurements), ‘short’ series (best of 7th to 9th measurement) and ‘long’ series (best of the last 3 measurements). Results: Under control conditions, the mean increase (‘baseline’ vs. ‘long’ series) was 11.4 (5.8)%; following the RWU, the increase (post RWU ‘baseline’ vs. ‘long’ series) was 3.2 (10.0)%. There were statistically significant differences between measurements made at all 3 protocol stages (‘baseline’, ‘short’ and ‘long’ series) under control conditions, but none following the RWU. Conclusions: The present data suggest that a specific RWU may attenuate the ‘learning effect’ during repeated PImax measurements, which is one of the main contributors of the test variability. The use of a RWU may provide a means of obtaining reliable values of PImax following just 3 measurements. |
Description: | The official published version can be obtained from the link below |
URI: | http://bura.brunel.ac.uk/handle/2438/4794 |
DOI: | http://dx.doi.org/10.1159/000050458 |
ISSN: | 0025-7931 |
Appears in Collections: | Sport Dept of Life Sciences Research Papers |
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