Posture-dependent isometric trunk extension and flexion strength in normal male and female subjects

被引:28
作者
Keller, TS [1 ]
Roy, AL [1 ]
机构
[1] Univ Vermont, Dept Mech Engn, Musculoskeletal Res Lab, Burlington, VT 05405 USA
来源
JOURNAL OF SPINAL DISORDERS & TECHNIQUES | 2002年 / 15卷 / 04期
关键词
biomechanical modeling; extension; isometric flexion; posture; trunk muscle strength; trunk torque;
D O I
10.1097/00024720-200208000-00009
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
The objective of this study was to quantify the relationship between trunk posture and trunk muscle function in a group of young, normal male and female subjects. Ten male and 10 female subjects performed. isometric flexion and extension tasks using a trunk dynamometer. Peak isometric torque was recorded in flexion and extension at 10degrees increments over a sagittal posture range of -20degrees extension to +50degrees of flexion. Significant differences in trunk strength (isometric torque) were found between males and females, at various sagittal plane trunk postures, and between flexion (F) and extension (E) tasks. Flexion torque was greatest at 20degrees to 30degrees flexion, whereas extension torque was greatest at 50degrees flexion. Gender-specific differences in trunk strength were markedly reduced when the torque data were normalized by the subject's height multiplied by body weight. The E/F torque ratio showed a relatively linear, over twofold increase with increasing flexion angle, and was significantly greater for female subjects compared with male subjects at most sagittal postures. The baseline trunk isometric strength data provided by this study should help clinicians to use strength testing more precisely and specifically in prevention and diagnosis of patients at risk for back disorders.
引用
收藏
页码:312 / 318
页数:7
相关论文
共 22 条
[1]   Reproducibility and validity of a new test protocol for measuring isokinetic trunk extension strength [J].
Dvir, Z ;
Keating, J .
CLINICAL BIOMECHANICS, 2001, 16 (07) :627-630
[2]   Trunk extension strength and muscle activity in standing and kneeling postures [J].
Gallagher, S .
SPINE, 1997, 22 (16) :1864-1872
[3]   NORMATIVE DATABASE FOR TRUNK RANGE OF MOTION, STRENGTH, VELOCITY, AND ENDURANCE WITH THE ISOSTATION B-200 LUMBAR DYNAMOMETER [J].
GOMEZ, T ;
BEACH, G ;
COOKE, C ;
HRUDEY, W ;
GOYERT, P .
SPINE, 1991, 16 (01) :15-21
[4]   QUANTITATIVE ASSESSMENT OF FULL RANGE-OF-MOTION ISOMETRIC LUMBAR EXTENSION STRENGTH [J].
GRAVES, JE ;
POLLOCK, ML ;
CARPENTER, DM ;
LEGGETT, SH ;
JONES, A ;
MACMILLAN, M ;
FULTON, M .
SPINE, 1990, 15 (04) :289-294
[5]   A biomechanical model of the lumbar spine during upright isometric flexion, extension, and lateral bending [J].
Guzik, DC ;
Keller, TS ;
Szpalski, M ;
Park, JH ;
Spengler, DM .
SPINE, 1996, 21 (04) :427-433
[6]   FORCE LENGTH PROPERTIES AND FUNCTIONAL DEMANDS OF CAT GASTROCNEMIUS, SOLEUS AND PLANTARIS MUSCLES [J].
HERZOG, W ;
LEONARD, TR ;
RENAUD, JM ;
WALLACE, J ;
CHAKI, G ;
BORNEMISZA, S .
JOURNAL OF BIOMECHANICS, 1992, 25 (11) :1329-1335
[7]   The heat of shortening and the dynamic constants of muscle [J].
Hill, AV .
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES, 1938, 126 (843) :136-195
[8]  
Holmes B, 1996, J SPINAL DISORD, V9, P17
[9]  
Keller TS, 1999, J SPINAL DISORD, V12, P313
[10]   Trunk strength in combined motions of rotation and flexion/extension in normal young adults [J].
Kumar, S ;
Narayan, Y ;
Zedka, M .
ERGONOMICS, 1998, 41 (06) :835-852