The Relationship Between Q Angle and Quadriceps Muscle Activation on Dynamic Balance in Women (Quadriceps)

The quadriceps angle (Q angle) is significant for the lower extremity alignment. Anatomical alignment of Q angle is related to Quadriceps muscle strength. Women have consistently been found to have larger Q angles than men and are more often affected due to patellofemoral problems. Quadriceps muscle activation and lower extremity alignment affect musculoskeletal health in women.The aim of this study wa s to determine the relationship between Q angle and quadriceps muscle activation on dynamic balance in women.

Study Overview

• Status: Completed
• Conditions: Physiotherapy and Rehabilitation
• Intervention / Treatment: Other: Evaluation of Q angle and Quadriceps muscle activation on dynamic balance position

Detailed Description

Objective: To determine the relationship between Q angle and quadriceps muscle activation on dynamic balance in women. Design: Correlational Study. Setting: University. Participants: Forth women will be included in the study. Interventions: Q angle in standing and supine positions, quadriceps muscle activation, static and dynamic balance and functionality were measured. Main Outcome Measurements: Q angle will measured with a tape measure; muscle activation will measured with Surface Electromyography (EMG) static balance will measured with Flamingo Balance Test (FBT); dynamic balance will measured with ProKin 252 Techno Body device; and, functionality will measured with Short Form Musculoskeletal Assessment (SFMA). Before the evaluation of EMG amplitude on dynamic balance position, the Q angle will measured in supine and standing positions. The EMG signals collected by measuring the muscle activation of the Vastus Medialis and Vastus Lateralis during dynamic balance position on the ProKin device will recorded.

• Study Type: Interventional
• Enrollment (Actual): 40
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Turkey
  • Istanbul, Turkey
    • İstanbul Medipol University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 19 years to 25 years (ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: Female

Description

Inclusion Criteria:

• The inclusion criteria were being women, being aged 19-25, and not having musculoskeletal or neurological problems.

Exclusion Criteria:

• Exclusion criteria were having an operation in the past year, taking medicine related to lower limb problems, persistent pain and discomfort of the lower extremity.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: OTHER
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

EXPERIMENTAL: Experimental group; Before the evaluation of EMG amplitude on dynamic balance position, the Q angle was measured in supine and standing positions. The EMG signals collected by measuring the muscle activation of the Vastus Medialis and Vastus Lateralis during dynamic balance position on the ProKin device were recorded. Q angle evaluations, static and dynamic balance and functional status of all participants were evaluated.

Other: Evaluation of Q angle and Quadriceps muscle activation on dynamic balance position; Evaluation of Q angle, Quadriceps muscle activation, static and dynamic balance and functionality of all individuals was done.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Q angle evaluation	The Q angle was measured with a standard universal goniometer. It was measured by drawing a line from the Anterior Superior Iliac Spine to the center of the patella and a second line from the center of the tibial tubercle to the center of the patella.	5 minutes
Electromyographic (EMG) measurements	EMG biofeedback is a device that detects neuromuscular contractions and provides feedback signals to the subject. During the ProKin 252 Techno Body balance system, Vastus Medialis and Vastus Lateralis muscles activity levels were recorded at 1000-Hz sample data-regulating Surface EMG device and analyzed using the Biometrics Datalog (UK) system.	15 minutes
Dynamic Balance Evaluation	Dynamic balance was evaluated by ProKin 252 Techno Body balance device. The participants were taken to the balance platform on the right foot with their eyes open, after determining the reference interval and setting the test time as 30 seconds.They were instructed to stay balanced on the platform	15 minutes

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Static Balance Evaluation	Static balance was assessed with Flamingo Balance Test (FBT) in open and closed eyes conditions.The subjects stood on the beam which was 50 cm long, 5 cm in height and 3 cm wide. Then the instructor started the stopwatch and the subjects tried to stand in this position for one minute. When the time was over, the subjects' attempts after they fell were counted and this score was recorded	5 minutes
Functionality Assessment	The functional status of subjects was evaluated with the Short Musculoskeletal Function Assessment Questionnaire (SMFA).	5 minutes

Collaborators and Investigators

• Sponsor: Istanbul Medipol University Hospital

Publications and helpful links

General Publications

• Nguyen AD, Boling MC, Levine B, Shultz SJ. Relationships between lower extremity alignment and the quadriceps angle. Clin J Sport Med. 2009 May;19(3):201-6. doi: 10.1097/JSM.0b013e3181a38fb1.

Study record dates

Study Major Dates

• Study Start (ACTUAL): January 15, 2019
• Primary Completion (ACTUAL): February 13, 2021
• Study Completion (ACTUAL): February 15, 2021

Study Registration Dates

• First Submitted: May 13, 2021
• First Submitted That Met QC Criteria: May 20, 2021
• First Posted (ACTUAL): May 21, 2021

Study Record Updates

• Last Update Posted (ACTUAL): May 21, 2021
• Last Update Submitted That Met QC Criteria: May 20, 2021
• Last Verified: May 1, 2021

More Information

Terms related to this study

• Keywords: Balance; EMG; Q angle; Quadriceps muscle activation
• Other Study ID Numbers: merveyilmaz

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: I will publish my manuscript about this study, so researchers can access my individual participant's daha with this way.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No