Analysis of Different Hip Adductors Exercises

Kinematic and Electromyographic Analysis of Different Hip Adductors Exercises

Groin injuries present a major problem in sports due to its high frequency, long-lasting symptoms and high risk of re-injury. The most common groin injury is the adductor strain (around two thirds of all groin injuries), while the biggest risk factors are previous injury and lower hip adductors strength. The purpose of this study is to present and biomechanically evaluate several new strengthening exercises targeting hip adductors. Exercises will be performed with the use of our novelty device, which enables eccentric strengthening of the hip adductors in different hip and knee positions. We hypothesize that performing modified hip adductors exercises using the novelty device could enable participants to perform hip adduction throughout larger ROM during eccentric contractions, while changing hip and/or knee angle will differently affect muscle activity and produced joint torques. The latter could be helpful for preventive or rehabilitative training for hip adductors strain injuries, in which therapists want to target specific hip adductor muscle.

Study Overview

• Status: Unknown
• Conditions: Injury of Hip and Thigh
• Intervention / Treatment: Other: Hip adductors exercise variations

Detailed Description

Following the general warm-up (light aerobic activity, dynamic stretching exercises and bodyweight strength exercises), the electromyographic (EMG) sensors and kinematic markers will be attached to the participant, who will then perform the maximal voluntary contractions for the purpose of EMG normalization. Then the participant will perform new hip adductor exercises using the novelty device, which enables hip adduction eccentric contractions in different hip and knee positions. The latter is important when trying to target specific hip adductor muscle, since different hip and/or knee angles differently affect individual muscle activity and joint torques. Exercises will be performed in randomized order, while the EMG and kinematic signals will be synchronously captured. EMG muscle activity and joint torques, produced during the exercises, will be analysed. Descriptive statistics will be calculated and reported as mean ± standard deviation. Shapiro-Wilk test will be used for testing of normality and Levene's test for equality of variances. Differences among corresponding variables will be obtained from different exercises and tested with the analysis of the variance for repeated measurements. For pair-wise comparisons, paired 2-tailed post-hoc t-tests with Bonferroni's correction will be used. The level of statistical significance will be set at p < 0.05.

• Study Type: Interventional
• Enrollment (Anticipated): 18
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Nejc Šarabon, PhD; Phone Number: +386 05 662 64 66; Email: nejc.sarabon@fvz.upr.si

Study Locations

• Slovenia
  • Izola, Slovenia, 6310
    • Faculty of Health Sciences
    • Contact: Nejc Šarabon, PhD; Phone Number: +386 05 662 64 66; Email: nejc.sarabon@fvz.upr.si

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 40 years (ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

Performing regular physical activity, experience with strength training.

Exclusion Criteria:

Neural, muscular, skeletal or connective tissue injuries during the last 12 months in the area of the back, hips and legs.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: BASIC_SCIENCE
• Interventional Model: CROSSOVER
• Masking: NONE

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Muscle activity	Muscle activity of (bilateral) adductor longus, gluteus maximus, gluteus medius, rectus abdominis and obliquus externus will be measured using electromyographic sensors.	3 hours
Net joint torque	Net joint torques at the knee and hip will be calculated from kinematic data, measured in frontal plane using 3D kinematic motion capture system.	3 hours

Collaborators and Investigators

• Sponsor: University of Primorska

Study record dates

Study Major Dates

• Study Start (ANTICIPATED): January 1, 2020
• Primary Completion (ANTICIPATED): January 1, 2020
• Study Completion (ANTICIPATED): January 1, 2020

Study Registration Dates

• First Submitted: September 21, 2019
• First Submitted That Met QC Criteria: September 21, 2019
• First Posted (ACTUAL): September 24, 2019

Study Record Updates

• Last Update Posted (ACTUAL): October 11, 2019
• Last Update Submitted That Met QC Criteria: October 10, 2019
• Last Verified: October 1, 2019

More Information

Terms related to this study

• Keywords: rehabilitation; prevention; injury; sport; groin pain; adductor strain
• Additional Relevant MeSH Terms: Wounds and Injuries; Hip Injuries
• Other Study ID Numbers: UP-FVZ-HipAdductorsExercises

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

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