Brandi G Schwane1, Benjamin M Goerger2, Shiho Goto3, J Troy Blackburn4, Alain J Aguilar5, Darin A Padua3. 1. The College of William and Mary, Williamsburg, VA; 2. Sports Medicine Research Laboratory, Georgia State University, Atlanta; 3. Sports Medicine Research Laboratory. 4. Neuromuscular Research Laboratory, and. 5. Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill.
Abstract
CONTEXT: There is limited evidence indicating the contribution of trunk kinematics to patellofemoral pain (PFP). A better understanding of the interaction between trunk and lower extremity kinematics in this population may provide new avenues for interventions to treat PFP. OBJECTIVE: To compare trunk and lower extremity kinematics between participants with PFP and healthy controls during a stair-descent task. DESIGN: Cross-sectional study. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Twenty women with PFP (age = 22.2 ± 3.1 years, height = 164.5 ± 9.2 cm, mass = 63.5 ± 13.6 kg) and 20 healthy women (age = 21.0 ± 2.6 years, height = 164.5 ± 7.1 cm, mass = 63.8 ± 12.7 kg). INTERVENTION(S): Kinematics were recorded as participants performed stair descent at a controlled velocity. MAIN OUTCOME MEASURE(S): Three-dimensional joint displacement of the trunk, hip, and knee during the stance phase of stair descent for the affected leg was measured using a 7-camera infrared optical motion-capture system. Pretest and posttest pain were assessed using a visual analogue scale. Kinematic differences between groups were determined using independent-samples t tests. A 2 × 2 mixed-model analysis of variance (group = PFP, control; time = pretest, posttest) was used to compare knee pain. RESULTS: We observed greater knee internal-rotation displacement for the PFP group (12.8° ± 7.2°) as compared with the control group (8.9° ± 4.4°). No other between-groups differences were observed for the trunk, hip, or other knee variables. CONCLUSIONS: We observed no difference in trunk kinematics between groups but did note differences in knee internal-rotation displacement. These findings contribute to the current knowledge of altered movement in those with PFP and provide direction for exercise interventions.
CONTEXT: There is limited evidence indicating the contribution of trunk kinematics to patellofemoral pain (PFP). A better understanding of the interaction between trunk and lower extremity kinematics in this population may provide new avenues for interventions to treat PFP. OBJECTIVE: To compare trunk and lower extremity kinematics between participants with PFP and healthy controls during a stair-descent task. DESIGN: Cross-sectional study. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Twenty women with PFP (age = 22.2 ± 3.1 years, height = 164.5 ± 9.2 cm, mass = 63.5 ± 13.6 kg) and 20 healthy women (age = 21.0 ± 2.6 years, height = 164.5 ± 7.1 cm, mass = 63.8 ± 12.7 kg). INTERVENTION(S): Kinematics were recorded as participants performed stair descent at a controlled velocity. MAIN OUTCOME MEASURE(S): Three-dimensional joint displacement of the trunk, hip, and knee during the stance phase of stair descent for the affected leg was measured using a 7-camera infrared optical motion-capture system. Pretest and posttest pain were assessed using a visual analogue scale. Kinematic differences between groups were determined using independent-samples t tests. A 2 × 2 mixed-model analysis of variance (group = PFP, control; time = pretest, posttest) was used to compare knee pain. RESULTS: We observed greater knee internal-rotation displacement for the PFP group (12.8° ± 7.2°) as compared with the control group (8.9° ± 4.4°). No other between-groups differences were observed for the trunk, hip, or other knee variables. CONCLUSIONS: We observed no difference in trunk kinematics between groups but did note differences in knee internal-rotation displacement. These findings contribute to the current knowledge of altered movement in those with PFP and provide direction for exercise interventions.
Entities:
Keywords:
anterior knee pain; knee internal rotation; neuromuscular control
Authors: Theresa H Nakagawa; Erika T U Moriya; Carlos D Maciel; Fábio V Serrão Journal: J Orthop Sports Phys Ther Date: 2012-03-08 Impact factor: 4.751