Effects of the Copenhagen Plank on Hip Adductor Strength and Countermovement Jump Height in Female Soccer Players: A Randomized Controlled Trial

evaluate the effects of a 4-week Copenhagen Plank protocol on hip adductor strength and countermovement jump (CMJ) height in female soccer players and to determine whether adaptations were maintained during a 4-week follow-up.

Study Overview

• Status: Completed
• Conditions: Soccer Training; Strength Training Adaptations
• Intervention / Treatment: Behavioral: Copenhagen Plank Exercise Program

• Study Type: Interventional
• Enrollment (Actual): 25
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Spain
  • Murcia
    • Murcia, Murcia, Spain
      • MURCIA

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• All players trained at least twice weekly. The Copenhagen Plank intervention was supervised by a strength and conditioning coach with ≥10 years of experience in elite or sub-elite soccer. Inclusion criteria were being an active federated player, age between 18 and 35 years, and absence of lower limb injuries in the 6 months prior to the study

Exclusion Criteria:

• 2 were excluded for recent injuries and one player left the team before the data collection began.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
No Intervention: CONTROL GROUP
Experimental: experimental group; EXPERIMENTAL GROUP	Behavioral: Copenhagen Plank Exercise Program; Participants performed a progressive Copenhagen Plank exercise program twice weekly for 4 weeks in addition to their regular soccer training. The program started with 2 sets of 8-10 repetitions per side and progressed to 3 sets of 12-15 repetitions per side during the final week. All sessions were supervised by a strength and conditioning coach.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Isometric Hip Adductor Strength	Isometric hip adductor strength of the dominant and non-dominant limbs was assessed using a Lafayette handheld dynamometer during the long-lever squeeze test. The highest value of three maximal voluntary isometric contractions was recorded and expressed in Newtons (N).	Baseline, 4 weeks (post-intervention), and 8 weeks (4-week follow-up)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Countermovement Jump Height	Countermovement jump height was measured using a Chronojump contact platform. Participants performed three jumps with their hands on their hips, and the highest jump height (cm) was recorded.	Baseline, 4 weeks (post-intervention), and 8 weeks (4-week follow-up)

Collaborators and Investigators

• Sponsor: Universidad de Murcia

Study record dates

Study Major Dates

• Study Start (Actual): November 2, 2022
• Primary Completion (Actual): March 29, 2023
• Study Completion (Actual): May 23, 2023

Study Registration Dates

• First Submitted: July 4, 2026
• First Submitted That Met QC Criteria: July 4, 2026
• First Posted (Actual): July 10, 2026

Study Record Updates

• Last Update Posted (Actual): July 10, 2026
• Last Update Submitted That Met QC Criteria: July 4, 2026
• Last Verified: July 1, 2026

More Information

Terms related to this study

• Keywords: hip adductor strength; Copenhagen Plank; female soccer; countermovement jump.
• Other Study ID Numbers: CE012302 (Registry Identifier: Javier Reina-Abellán , Luis Blanco-López , Rocío Martínez-Fernández , Cinta Gómez-Tomás)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

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