Document Detail

Spinal flexibility affects range of trunk flexion during performance of a maximum voluntary trunk curl-up.
MedLine Citation:
PMID:  19077739     Owner:  NLM     Status:  MEDLINE    
The present study investigated the relationship between spinal flexibility and range of trunk flexion during curl-up performance. Fifty young adult men (age: 18.93 +/- 1.31 years; height: 179.4 +/- 5.7 cm; mass: 73.95 +/- 7.8 kg) performed a spinal flexibility measurement test and a maximum voluntary trunk curl-up from the supine position. The 2 tests were paced to the beat of a metronome and had a constant movement duration set to 5 seconds. Spinal and pelvic motions were recorded with the help of 2 electromagnetic tracking sensors (Flock of Birds, Ascension Technologies, Inc., Burlington, Vt; sampling rate 100 Hz) attached to the seventh cervical (C7) and first sacral (S1) vertebrae, respectively. Correlation and linear regression analyses revealed a significant relationship between spinal flexibility and curl-up performance, with spinal flexibility accounting for 18% of the variance in the range of trunk flexion during performance of the voluntary trunk curl-up. No significant anterior tilt of the pelvis was noted during performance of the trunk curl-up. On the other hand, a minor posterior pelvic rotation depicted during the initial phase of the trunk curl-up was negatively correlated with spinal flexibility. It is concluded that a normal range of spinal flexibility is critical for the optimal performance of abdominal strength training exercises such as trunk curl-ups from the supine position. The results of the present study are relevant to the design and evaluation of training programs for improving strength and function of the abdominal muscles in rehabilitation and sports contexts.
Dimitrios Gidaris; Vassilia Hatzitaki; Konstantinos Mandroukas
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  23     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-06     Completed Date:  2009-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  170-6     Citation Subset:  IM    
Department of Physical Education, Laboratories of Exercise Physiology, Aristotle University, Thessaloniki, Greece.
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MeSH Terms
Abdominal Muscles / physiology*
Exercise / physiology*
Muscle Contraction / physiology
Muscle Strength / physiology
Physical Education and Training
Range of Motion, Articular / physiology*
Sensitivity and Specificity
Spine / physiology*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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