Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 15361
  Title Isometric back extension endurance tests: a review of the literature [review]
Journal J Manipulative Physiol Ther. 2001 Feb;24(2):110-122
Peer Review Yes
Publication Type Review
Abstract/Notes OBJECTIVE: To review the literature that describes and evaluates the use of isometric back extension endurance tests.

DATA COLLECTION: Relevant articles in English were retrieved through a search of MEDLINE and the Index to Chiropractic Literature. Key search terms were back muscle endurance, isometric back endurance, trunk extensors, back muscle performance, and Sorensen test.

DATA SYNTHESIS: The principal criterion for inclusion was as follows: any study that discussed or tested an isometric type of back endurance extension test. Studies that were excluded did not use an isometric testing protocol. Thirty-seven of the initial studies are included in this review.

RESULTS: Six different types of isometric back extension endurance testing methods were found. Three of these procedures require special testing devices. Much of the research on this topic has centered on a procedure known as the Sorensen test. Normative databases have been established for the Sorensen test and 2 other test types. Validity and reliability have been assessed for some of the procedures.

CONCLUSIONS: The influence of motivation and effort exerted by the subject are limiting factors in all of the tests reviewed. These psychologic factors warrant further research. On the basis of the literature reviewed, we determined that the Sorensen is probably the most clinically useful of these tests; it is easy to perform, requires no special equipment, and enjoys the most support from the literature.

Click on the above link for the PubMed record for this review; full text by subscription.

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