Passive trunk loading influences muscle activation during dynamic activity.

Abstract:

INTRODUCTION:Repetitive loading of the low back tissues induces tension relaxation with a corresponding variation in the myoelectric response of the neuromuscular system, which may influence low back health. The purpose of this study was to observe trunk muscle activities before and after a passive cyclic trunk flexion-extension exercise. METHODS:Nineteen participants were subjected to sagittal plane loading of the low back tissues. These individuals performed toe-touching before and over 1 hour after load termination. RESULTS:Lumbar paraspinal activity cessation occurred significantly sooner over time during lumbar and pelvic flexion post-loading, as compared with pre-loading. Lumbar paraspinal activity then re-initiated later in lumbar extension. There was no change in peak or average muscle activity during the procedures. CONCLUSIONS:It is apparent that passive loading of the viscoelastic lumbar tissues results in a prolonged neuromuscular adaptation, followed by possible neuromuscular compensation sustained within 1 hour of load termination.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Olson MW

doi

10.1002/mus.22154

subject

Has Abstract

pub_date

2011-11-01 00:00:00

pages

749-56

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

44

pub_type

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