Abstract
CONTEXT
Very few authors have investigated the relationship between hip-abductor muscle strength and frontal-plane knee mechanics during running.
OBJECTIVE
To investigate this relationship using a 3-week hip-abductor muscle-strengthening program to identify changes in strength, pain, and biomechanics in runners with patellofemoral pain syndrome (PFPS).
SETTING
University-based clinical research laboratory.
PATIENTS OR OTHER PARTICIPANTS
Fifteen individuals (5 men, 10 women) with PFPS and 10 individuals without PFPS (4 men, 6 women) participated.
INTERVENTION(S)
The patients with PFPS completed a 3-week hip-abductor strengthening protocol; control participants did not.
MAIN OUTCOME MEASURE(S)
The dependent variables of interest were maximal isometric hip-abductor muscle strength, 2-dimensional peak knee genu valgum angle, and stride-to-stride knee-joint variability. All measures were recorded at baseline and 3 weeks later. Between-groups differences were compared using repeated-measures analyses of variance.
RESULTS
At baseline, the PFPS group exhibited reduced strength, no difference in peak genu valgum angle, and increased stride-to-stride knee-joint variability compared with the control group. After the 3-week protocol, the PFPS group demonstrated increased strength, less pain, no change in peak genu valgum angle, and reduced stride-to-stride knee-joint variability compared with baseline.
CONCLUSIONS
A 3-week hip-abductor muscle-strengthening protocol was effective in increasing muscle strength and decreasing pain and stride-to-stride knee-joint variability in individuals with PFPS. However, concomitant changes in peak knee genu valgum angle were not observed.
TY - JOUR
T1 - Changes in knee biomechanics after a hip-abductor strengthening protocol for runners with patellofemoral pain syndrome.
AU - Ferber,Reed,
AU - Kendall,Karen D,
AU - Farr,Lindsay,
PY - 2011/3/12/entrez
PY - 2011/3/12/pubmed
PY - 2011/9/21/medline
SP - 142
EP - 9
JF - Journal of athletic training
JO - J Athl Train
VL - 46
IS - 2
N2 - CONTEXT: Very few authors have investigated the relationship between hip-abductor muscle strength and frontal-plane knee mechanics during running. OBJECTIVE: To investigate this relationship using a 3-week hip-abductor muscle-strengthening program to identify changes in strength, pain, and biomechanics in runners with patellofemoral pain syndrome (PFPS). DESIGN: Cohort study. SETTING: University-based clinical research laboratory. PATIENTS OR OTHER PARTICIPANTS: Fifteen individuals (5 men, 10 women) with PFPS and 10 individuals without PFPS (4 men, 6 women) participated. INTERVENTION(S): The patients with PFPS completed a 3-week hip-abductor strengthening protocol; control participants did not. MAIN OUTCOME MEASURE(S): The dependent variables of interest were maximal isometric hip-abductor muscle strength, 2-dimensional peak knee genu valgum angle, and stride-to-stride knee-joint variability. All measures were recorded at baseline and 3 weeks later. Between-groups differences were compared using repeated-measures analyses of variance. RESULTS: At baseline, the PFPS group exhibited reduced strength, no difference in peak genu valgum angle, and increased stride-to-stride knee-joint variability compared with the control group. After the 3-week protocol, the PFPS group demonstrated increased strength, less pain, no change in peak genu valgum angle, and reduced stride-to-stride knee-joint variability compared with baseline. CONCLUSIONS: A 3-week hip-abductor muscle-strengthening protocol was effective in increasing muscle strength and decreasing pain and stride-to-stride knee-joint variability in individuals with PFPS. However, concomitant changes in peak knee genu valgum angle were not observed.
SN - 1938-162X
UR - https://www.unboundmedicine.com/medline/citation/21391799/Changes_in_knee_biomechanics_after_a_hip_abductor_strengthening_protocol_for_runners_with_patellofemoral_pain_syndrome_
DB - PRIME
DP - Unbound Medicine
ER -
