Copenhagen Adduction Exercise Vs an Adductor Squeeze Exercise

NCT04508192 | Completed

• 1 other identifier: CAvsSQ
• Study Type: interventional
• Target: 57
• Locations: 1 country
• Sites: 1

Brief Summary

The study aims to compare the effects of two different adduction exercises on adduction strength. Young male football players will be individually randomized to perform one of these exercises in addition to their normal training. The two exercise protocols are of 8 weeks duration and are matched in terms of total load.

Conditions

Groin Injury

Outcome Measures

Primary Outcomes (1)

• Eccentric hip adductor strength

  The athlete lies on the side of the tested leg with their hip and knee in a straight position. The hip and knee of the other leg are placed in 90deg of flexion with the knee placed on a box to maintain position of the pelvis. The athlete holds on to the side of the bed with one hand for stabilization. The examiner lifts the tested leg off the bed into full adduction and applies a downward force to the limb holding the HHD 5cm above the medial, while the athlete is asked to resist that force performing hip adduction "as hard as possible" Then the tester breaks the athlete's resistance applying a downward force. The procedure is performed three times with a 30-second rest between each of them and the highest value is recorded.

  Change from baseline eccentric adductor strength at 8 weeks

Secondary Outcomes (2)

• Unilateral isometric adduction strength

  Change from baseline isometric adductor strength at 8 weeks

• Delayed onset muscle soreness

  Difference in mean muscle soreness at 8 weeks

Study Arms (2)

Copenhagen Adduction

EXPERIMENTAL

The CA is a high-intensity partner exercise where the player is lying on their side using the elbow of the lower forearm to support their body and the other arm placed along their body. The upper arm is supported by the partner who places their one hand under the knee and the other under the ankle, holding the leg approximately in the height of their hip. The player performs a 3-second concentric movement lifting their body until it reaches a straight line. At the same time, the other leg is adducted so that it touches the other leg. A 3-second eccentric adduction then follows with the body lowered halfway to the ground and the foot of the lower leg touching the ground without supporting the body.

Other: Exercise

Adductor Squeeze

ACTIVE COMPARATOR

The SQ exercise is an isometric hip adduction exercise with the player holding a ball between their knees. The player lies supine with the ball placed between the knees with the knees and hips flexed and the feet flat on the surface with the first toe is pointed straight forward.the player is asked to press against the ball as hard as they can The contraction is held for 10 seconds

Other: Exercise

Interventions

Exercise OTHER

Both interventions are simple strength exercises without technical equipment

Adductor Squeeze; Copenhagen Adduction

Eligibility Criteria

• Age: 16 Years - 40 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Male football players 16 years or older, who were participating in full team training in Greece.

You may not qualify if:

• any systematic resistance training of the hip adductors (\> 1/week) in the preceding 1 month before study initiation.
• groin pain resulting in loss of one or more football matches/training sessions in the preceding 1 month prior to study initiation.
• any longstanding injury (≥ 6 weeks) in the lower extremities or in the hip/groin in the preceding 6 months prior to study initiation.
• pain of more than 2/10 on a numeric rating scale (NRS) when performing the adduction strength tests or exercises were also excluded.
• For analysis, players will be excluded if there was an adherence of less than 75% of the exercise sessions.

Sponsors & Collaborators

• Aspetar: lead

Study Sites (1)

Elite football clubs

Athens, Greece

Location

MeSH Terms

Interventions

Exercise

Intervention Hierarchy (Ancestors)

Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena

Study Officials

• Vasileios Korakakis, PhD

  Aspetar Orthopaedic & Sports Medicine Hospital

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: INVESTIGATOR, OUTCOMES ASSESSOR
• Masking Details: The person performing the strength tests will be blinded to group allocation, and participants will be instructed not to reveal any information about their group allocation. In addition, the physiotherapist supervising the intervention procedures will not be allowed to know the results of the strength measurements of each player.
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Clinical Research Scientist

Model Details: Randomisation will be performed after baseline strength testing. Participants will be individually randomized to perform either the CA or the SQ exercise protocol. The randomisation sequence will be obtained using an online software (e.g. randomizer.org), and sealed, opaque envelopes containing group allocation will be prepared by an independent person not otherwise involved in the study, and who will be unaware of the baseline strength test results. All participants will be instructed not to perform any additional adductor exercise other than their allocated exercise and to keep their regular training as usual.

Study Record Dates

• First Submitted: August 5, 2020
• First Posted: August 11, 2020
• Study Start: August 3, 2020
• Primary Completion: December 20, 2022
• Study Completion: October 24, 2024
• Last Updated: February 11, 2025

Record last verified: 2024-10

Data Sharing

• IPD Sharing: Will not share

Locations

GR (1)