Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls Lee Herrington PII: DOI: Reference:
S0968-0160(13)00238-X doi: 10.1016/j.knee.2013.11.011 THEKNE 1835
To appear in:
The Knee
Received date: Revised date: Accepted date:
25 March 2013 23 October 2013 13 November 2013
Please cite this article as: Herrington Lee, Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls, The Knee (2013), doi: 10.1016/j.knee.2013.11.011
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
ACCEPTED MANUSCRIPT Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls .
T
Author: Lee Herrington PhD MCSP
SC R NU
AC
CE P
TE
D
MA
Corresponding author: Lee Herrington PhD MCSP Directorate of Sport Allerton Building University of Salford Manchester M6 6PU United Kingdom Tel: 00441612952326 Fax: 00441612952395 E-mail: [email protected]
IP
Senior Lecturer in Sports Rehabilitation, Directorate of Sport, University of Salford, UK
1
ACCEPTED MANUSCRIPT Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls
TE
D
MA
NU
SC R
IP
T
Abstract: Background: Patellofemoral pain (PFP) is a commonly presenting disorder of the lower limb, frequently effecting young physically active individuals particularly females. The condition has been associated with poor control of limb alignment whilst undertaking unilateral limb loading tasks. This poor alignment of the limb is believed to alter loading stress within the patellofemoral joint. This study aim to investigate the degree of knee valgus, assessed as 2D frontal plane projection angle (FPPA) during single leg squatting (SLS) and hop landing (SLL) tasks in patients with PFP and compare their performance to controls and the uninjured limb. Method: Twelve female subjects with unilateral PFP formed the patient group and thirty asymptomatic females formed the control group. They had their 2D frontal plane projection angle (FPPA) assessed during single leg squatting (SLS) and hop landing (SLL) tasks. Results: In the asymptomatic control group the mean FPPA for SLS was 8.4+/-5.1 degrees, SLL had mean FPPA of 13.5+/-5.7 degrees. In the PFP group the mean FPPA for SLS was 16.8+/-5.4 degrees, SLL had mean FPPA of 21.7+/-3.6 degrees these differences were significant (p2 cm) Medication as a part of the treatment
14
ACCEPTED MANUSCRIPT Table 2: Visual pain rating scale score for each of the tasks (mean +/- standard deviation) Single leg land
1(+/-1)
1(+/-1)#
5(+/-1.3)
PFP group asymptomatic knee
1.2(+/-1.2)
*Significant difference between tasks (p=0.03) #
SC R
PFP group symptomatic knee
AC
CE P
TE
D
MA
NU
non significant difference between tasks (p>0.05)
15
IP
Control group
T
Single leg squat
6.8(+/-1.1)# 1.9(+/-1.9)*
S0968-0160(13)00238-X doi: 10.1016/j.knee.2013.11.011 THEKNE 1835
To appear in:
The Knee
Received date: Revised date: Accepted date:
25 March 2013 23 October 2013 13 November 2013
Please cite this article as: Herrington Lee, Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls, The Knee (2013), doi: 10.1016/j.knee.2013.11.011
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
ACCEPTED MANUSCRIPT Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls .
T
Author: Lee Herrington PhD MCSP
SC R NU
AC
CE P
TE
D
MA
Corresponding author: Lee Herrington PhD MCSP Directorate of Sport Allerton Building University of Salford Manchester M6 6PU United Kingdom Tel: 00441612952326 Fax: 00441612952395 E-mail: [email protected]
IP
Senior Lecturer in Sports Rehabilitation, Directorate of Sport, University of Salford, UK
1
ACCEPTED MANUSCRIPT Knee valgus angle during single leg squat and landing in patellofemoral pain patients and controls
TE
D
MA
NU
SC R
IP
T
Abstract: Background: Patellofemoral pain (PFP) is a commonly presenting disorder of the lower limb, frequently effecting young physically active individuals particularly females. The condition has been associated with poor control of limb alignment whilst undertaking unilateral limb loading tasks. This poor alignment of the limb is believed to alter loading stress within the patellofemoral joint. This study aim to investigate the degree of knee valgus, assessed as 2D frontal plane projection angle (FPPA) during single leg squatting (SLS) and hop landing (SLL) tasks in patients with PFP and compare their performance to controls and the uninjured limb. Method: Twelve female subjects with unilateral PFP formed the patient group and thirty asymptomatic females formed the control group. They had their 2D frontal plane projection angle (FPPA) assessed during single leg squatting (SLS) and hop landing (SLL) tasks. Results: In the asymptomatic control group the mean FPPA for SLS was 8.4+/-5.1 degrees, SLL had mean FPPA of 13.5+/-5.7 degrees. In the PFP group the mean FPPA for SLS was 16.8+/-5.4 degrees, SLL had mean FPPA of 21.7+/-3.6 degrees these differences were significant (p2 cm) Medication as a part of the treatment
14
ACCEPTED MANUSCRIPT Table 2: Visual pain rating scale score for each of the tasks (mean +/- standard deviation) Single leg land
1(+/-1)
1(+/-1)#
5(+/-1.3)
PFP group asymptomatic knee
1.2(+/-1.2)
*Significant difference between tasks (p=0.03) #
SC R
PFP group symptomatic knee
AC
CE P
TE
D
MA
NU
non significant difference between tasks (p>0.05)
15
IP
Control group
T
Single leg squat
6.8(+/-1.1)# 1.9(+/-1.9)*
