부산대학교 도서관

We hypothesized that spinal manipulation (SM) would reduce strength imbalances between legs. Using an unblinded randomized design, 28 males and 21 females (54 ± 19y) with at least a 15% difference in isometric strength between legs for hip flexion, extension, abduction, or knee flexion were randomized to treatment or placebo (mock spinal manipulation). Strength of the stronger and weaker legs for hip flexion, extension, abduction, and/or knee flexion was assessed before and after the intervention. SM reduced the relative strength difference between legs for knee flexion (mean ± SD 57 ± 53 to 5 ± 14%) and hip flexion (24 ± 12 to 11 ± 15%) compared to placebo (34 ± 29 to 24 ± 36%, and 20 ± 18 to 22 ± 26%, respectively) (p = 0.05). SM also improved strength in the weak leg for hip abduction (104 ± 43 to 116 ± 43 Nm) compared to placebo (84 ± 24 to 85 ± 31 Nm) (p = 0.03). This study suggests that spinal manipulation may reduce imbalances in strength between legs for knee and hip flexion. (JCCA 2011; 55(3):183-192) KEY WORDS: hip, hamstring, flexion, extension, abduction Notre hypothese est que la manipulation vertebrale (MV) reduirait le desequilibre entre les jambes. A l'aide d'un essai aleatoire ouvert, 28 hommes et 21 femmes (54 ± 19a) ayant une difference de force isometrique d'au moins 15 % entre les jambes pour la flexion, l'etirement et l'abduction de la hanche, ou la flexion du genou, ont subi de facon aleatoire un traitement reel ou un traitement placebo (manipulation vertebrale simulee). On a alors evalue la force des jambes plus fortes et plus faibles en fonction de la flexion, l'etirement et l'abduction de la hanche, ou la flexion du genou, avant et apres l'intervention. La MV a reduit la difference de force entre les jambes quant a la flexion du genou (moyenne ± ET 57 ± 53 a 5 ± 14 %) et la flexion de la hanche (24 ± 12 a 11 ± 15 %) par rapport au traitement placebo (34 ± 29 a 24 ± 36 %, et 20 ± 18 a 22 ± 26 %, respectivement) (p = 0,05). La MV a egalement ameliore la force de la jambefaible quant a l'abduction de la hanche (104 ± 43 a 116 ± 43 Nm) par rapport au traitement placebo (84 ± 24 a 85 ± 31 Nm) (p = 0,03). Cette etude suggere que la manipulation vertebrale peut reduire le desequilibre de la force entre les jambes quant a la flexion du genou et de la hanche. (JCCA 2011; 55(3):183-192) MOTS CLES: hanche, tendon du jarret, flexion, etirement, abduction
Introduction Musculoskeletal injuries may be partly related to strength imbalances between limbs. Strength imbalances between legs may affect performance of activities and result in increased chance of injury occurrence. (1-8) [...]