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Effects of hip and trunk muscle strengthening on hip function and lower limb kinematics during step-down task.
Clin Biomech (Bristol, Avon). 2017 May; 44:28-35.CB

Abstract

BACKGROUND

Strengthening of the hip and trunk muscles has the potential to change lower limb kinematic patterns, such as excessive hip medial rotation and adduction during weight-bearing tasks. This study aimed to investigate the effect of hip and trunk muscles strengthening on hip muscle performance, hip passive properties, and lower limb kinematics during step-down task in women.

METHODS

Thirty-four young women who demonstrated dynamic knee valgus during step-down were divided into two groups. The experimental group underwent three weekly sessions of strengthening exercises for eight weeks, and the control group continued their usual activities. The following evaluations were carried out: (a) isokinetic maximum concentric and eccentric work of hip lateral rotators, (b) isokinetic hip passive torque of lateral rotation and resting transverse plane position, and (c) three-dimensional kinematics of the lower limb during step-down.

FINDINGS

The strengthening program increased concentric (P<0.001) and eccentric (P<0.001) work of hip lateral rotators, and changed hip resting position toward lateral rotation (P<0.001). The intervention did not significantly change hip passive torque (P=0.089, main effect). The program reduced hip (P=0.002), thigh (P=0.024) and shank (P=0.005) adduction during step-down task. Hip, thigh and knee kinematics in transverse plane and foot kinematics in frontal plane did not significantly modify after intervention (P≥0.069, main effect).

INTERPRETATION

Hip and trunk strengthening reduced lower limb adduction during step-down. The changes in hip maximum work and resting position may have contributed to the observed kinematic effects.

Authors+Show Affiliations

Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. Electronic address: laraujo.vanessa@gmail.com.Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.Department of Physical Therapy, Faculdade UNA de Bom Despacho, Bom Despacho, Minas Gerais, Brazil.Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. Electronic address: sfonseca@ufmg.br.

Pub Type(s)

Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

28315596

Citation

Araújo, Vanessa Lara, et al. "Effects of Hip and Trunk Muscle Strengthening On Hip Function and Lower Limb Kinematics During Step-down Task." Clinical Biomechanics (Bristol, Avon), vol. 44, 2017, pp. 28-35.
Araújo VL, Souza TR, Carvalhais VODC, et al. Effects of hip and trunk muscle strengthening on hip function and lower limb kinematics during step-down task. Clin Biomech (Bristol, Avon). 2017;44:28-35.
Araújo, V. L., Souza, T. R., Carvalhais, V. O. D. C., Cruz, A. C., & Fonseca, S. T. (2017). Effects of hip and trunk muscle strengthening on hip function and lower limb kinematics during step-down task. Clinical Biomechanics (Bristol, Avon), 44, 28-35. https://doi.org/10.1016/j.clinbiomech.2017.02.012
Araújo VL, et al. Effects of Hip and Trunk Muscle Strengthening On Hip Function and Lower Limb Kinematics During Step-down Task. Clin Biomech (Bristol, Avon). 2017;44:28-35. PubMed PMID: 28315596.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of hip and trunk muscle strengthening on hip function and lower limb kinematics during step-down task. AU - Araújo,Vanessa Lara, AU - Souza,Thales Rezende, AU - Carvalhais,Viviane Otoni do Carmo, AU - Cruz,Aline Castro, AU - Fonseca,Sérgio Teixeira, Y1 - 2017/02/27/ PY - 2016/07/31/received PY - 2017/02/11/revised PY - 2017/02/21/accepted PY - 2017/3/21/pubmed PY - 2017/12/23/medline PY - 2017/3/19/entrez KW - Kinematics KW - Lower limb KW - Muscle work KW - Passive torque KW - Step-down task KW - Strengthening SP - 28 EP - 35 JF - Clinical biomechanics (Bristol, Avon) JO - Clin Biomech (Bristol, Avon) VL - 44 N2 - BACKGROUND: Strengthening of the hip and trunk muscles has the potential to change lower limb kinematic patterns, such as excessive hip medial rotation and adduction during weight-bearing tasks. This study aimed to investigate the effect of hip and trunk muscles strengthening on hip muscle performance, hip passive properties, and lower limb kinematics during step-down task in women. METHODS: Thirty-four young women who demonstrated dynamic knee valgus during step-down were divided into two groups. The experimental group underwent three weekly sessions of strengthening exercises for eight weeks, and the control group continued their usual activities. The following evaluations were carried out: (a) isokinetic maximum concentric and eccentric work of hip lateral rotators, (b) isokinetic hip passive torque of lateral rotation and resting transverse plane position, and (c) three-dimensional kinematics of the lower limb during step-down. FINDINGS: The strengthening program increased concentric (P<0.001) and eccentric (P<0.001) work of hip lateral rotators, and changed hip resting position toward lateral rotation (P<0.001). The intervention did not significantly change hip passive torque (P=0.089, main effect). The program reduced hip (P=0.002), thigh (P=0.024) and shank (P=0.005) adduction during step-down task. Hip, thigh and knee kinematics in transverse plane and foot kinematics in frontal plane did not significantly modify after intervention (P≥0.069, main effect). INTERPRETATION: Hip and trunk strengthening reduced lower limb adduction during step-down. The changes in hip maximum work and resting position may have contributed to the observed kinematic effects. SN - 1879-1271 UR - https://www.unboundmedicine.com/medline/citation/28315596/Effects_of_hip_and_trunk_muscle_strengthening_on_hip_function_and_lower_limb_kinematics_during_step_down_task_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0268-0033(17)30057-8 DB - PRIME DP - Unbound Medicine ER -