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European Journal of Applied Physiology
Published in: European Journal of Applied Physiology 1/2018

01-01-2018 | Original Article

Causal effect of intra-abdominal pressure on maximal voluntary isometric hip extension torque

Authors: Kota Tayashiki, Fumihiro Mizuno, Hiroaki Kanehisa, Naokazu Miyamoto

Published in: European Journal of Applied Physiology | Issue 1/2018

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Abstract

Purpose

Intra-abdominal pressure (IAP) has been recently shown to be associated specifically with maximal voluntary isometric contraction (MVC) torque of hip extension, although the causal relationship remains unclear. The present study aimed to elucidate whether IAP has a causal effect on hip extension MVC torque.

Methods

IAP during hip extension MVC was changed by controlling the lung volume (i.e., depth of inspiration). Twelve healthy males conducted MVCs of hip extension during breath-hold at full inspiration (inspiratory condition) or expiration (expiratory condition), or during normal breath-hold (normal condition). IAP during MVCs was measured a pressure transducer placed in the rectum.

Results

The IAP during hip extension MVC was significantly higher in inspiratory condition (132.0 ± 46.1 mmHg) than in the other two conditions and also higher in normal condition (104.6 ± 35.9 mmHg) than in expiratory condition (77.0 ± 39.1 mmHg). The hip extension MVC torque was significantly higher in inspiratory condition (297.7 ± 82.7 N m) than in expiratory condition (266.4 ± 84.5 N m). In each condition, the hip extension MVC torque correlated with IAP during the MVC task.

Conclusion

The current results suggest that IAP has a positive causal effect on hip extension MVC torque and that a sufficient increase in IAP directly leads to an enhancement of hip extension MVC torque.
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Metadata
Title
Causal effect of intra-abdominal pressure on maximal voluntary isometric hip extension torque
Authors
Kota Tayashiki
Fumihiro Mizuno
Hiroaki Kanehisa
Naokazu Miyamoto
Publication date
01-01-2018
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Applied Physiology / Issue 1/2018
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-017-3748-0

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