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Trunk and lower extremity segment kinematics and their relationship to pain following movement instruction during a single-leg squat in females with dynamic knee valgus and patellofemoral pain.
J Sci Med Sport 2015; 18(3):343-7JS

Abstract

OBJECTIVES

To understand how instructing females with patellofemoral pain to correct dynamic knee valgus affects pelvis, femur, tibia and trunk segment kinematics. To determine if pain reduction in the corrected condition was associated with improved segment kinematics.

DESIGN

Cross-sectional.

METHODS

A 3D-motion capture system was used to collect multi-joint kinematics on 20 females with dynamic knee valgus and patellofemoral pain during a single-leg squat in two conditions: usual movement pattern, and corrected dynamic knee valgus. During each condition pain was assessed using a visual analog scale. Pelvis, femur, tibia and trunk kinematics in the frontal and transverse planes were compared between conditions using a paired T-test. Pearson correlation coefficients were generated between visual analog scale score and the kinematic variables in the corrected condition.

RESULTS

In the corrected condition subjects had increased lateral flexion of the pelvis toward the weight-bearing limb (p<0.001), decreased femoral adduction (p=0.001) and internal rotation (p=0.01). A trend toward decreased tibial internal rotation (p=0.057) and increased trunk lateral flexion toward the weight-bearing limb (p=0.055) was also found. Lower pain levels were associated with less femoral internal rotation (p=0.04) and greater trunk lateral flexion toward the weight-bearing limb (p=0.055).

CONCLUSIONS

Decreased hip adduction after instruction was comprised of motion at both the pelvis and femur. Decreased pain levels were associated with lower extremity segment kinematics moving in the direction opposite to dynamic knee valgus. These results increase our understanding of correction strategies used by females with patellofemoral pain and provide insight for rehabilitation.

Authors+Show Affiliations

University of Maryland School of Medicine, Department of Neurology, USA. Electronic address: vgraci@som.umaryland.edu.Musculoskeletal Movement Science Laboratory, Department of Physical Therapy and Athletic Training, Saint Louis University, USA.

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

24836048

Citation

Graci, Valentina, and Gretchen B. Salsich. "Trunk and Lower Extremity Segment Kinematics and Their Relationship to Pain Following Movement Instruction During a Single-leg Squat in Females With Dynamic Knee Valgus and Patellofemoral Pain." Journal of Science and Medicine in Sport, vol. 18, no. 3, 2015, pp. 343-7.
Graci V, Salsich GB. Trunk and lower extremity segment kinematics and their relationship to pain following movement instruction during a single-leg squat in females with dynamic knee valgus and patellofemoral pain. J Sci Med Sport. 2015;18(3):343-7.
Graci, V., & Salsich, G. B. (2015). Trunk and lower extremity segment kinematics and their relationship to pain following movement instruction during a single-leg squat in females with dynamic knee valgus and patellofemoral pain. Journal of Science and Medicine in Sport, 18(3), pp. 343-7. doi:10.1016/j.jsams.2014.04.011.
Graci V, Salsich GB. Trunk and Lower Extremity Segment Kinematics and Their Relationship to Pain Following Movement Instruction During a Single-leg Squat in Females With Dynamic Knee Valgus and Patellofemoral Pain. J Sci Med Sport. 2015;18(3):343-7. PubMed PMID: 24836048.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Trunk and lower extremity segment kinematics and their relationship to pain following movement instruction during a single-leg squat in females with dynamic knee valgus and patellofemoral pain. AU - Graci,Valentina, AU - Salsich,Gretchen B, Y1 - 2014/04/26/ PY - 2014/02/06/received PY - 2014/04/10/revised PY - 2014/04/18/accepted PY - 2014/5/20/entrez PY - 2014/5/20/pubmed PY - 2016/1/23/medline KW - Dynamic knee valgus KW - Frontal plane KW - Single-leg squat KW - Transverse plane SP - 343 EP - 7 JF - Journal of science and medicine in sport JO - J Sci Med Sport VL - 18 IS - 3 N2 - OBJECTIVES: To understand how instructing females with patellofemoral pain to correct dynamic knee valgus affects pelvis, femur, tibia and trunk segment kinematics. To determine if pain reduction in the corrected condition was associated with improved segment kinematics. DESIGN: Cross-sectional. METHODS: A 3D-motion capture system was used to collect multi-joint kinematics on 20 females with dynamic knee valgus and patellofemoral pain during a single-leg squat in two conditions: usual movement pattern, and corrected dynamic knee valgus. During each condition pain was assessed using a visual analog scale. Pelvis, femur, tibia and trunk kinematics in the frontal and transverse planes were compared between conditions using a paired T-test. Pearson correlation coefficients were generated between visual analog scale score and the kinematic variables in the corrected condition. RESULTS: In the corrected condition subjects had increased lateral flexion of the pelvis toward the weight-bearing limb (p<0.001), decreased femoral adduction (p=0.001) and internal rotation (p=0.01). A trend toward decreased tibial internal rotation (p=0.057) and increased trunk lateral flexion toward the weight-bearing limb (p=0.055) was also found. Lower pain levels were associated with less femoral internal rotation (p=0.04) and greater trunk lateral flexion toward the weight-bearing limb (p=0.055). CONCLUSIONS: Decreased hip adduction after instruction was comprised of motion at both the pelvis and femur. Decreased pain levels were associated with lower extremity segment kinematics moving in the direction opposite to dynamic knee valgus. These results increase our understanding of correction strategies used by females with patellofemoral pain and provide insight for rehabilitation. SN - 1878-1861 UR - https://www.unboundmedicine.com/medline/citation/24836048/Trunk_and_lower_extremity_segment_kinematics_and_their_relationship_to_pain_following_movement_instruction_during_a_single_leg_squat_in_females_with_dynamic_knee_valgus_and_patellofemoral_pain_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1440-2440(14)00080-2 DB - PRIME DP - Unbound Medicine ER -