Relation Between Rectus Femoris Muscle Tension and Hamstring Strength and Activity in Healthy Sprinters

An open-label, single-group, control, pretest-posttest clinical trial is going to be conducted, with 16 healthy sprinters. Rectus femoris length and hamstring strength and electromyography is going to be assessed at baseline, after 10 minutes control and after an static rectus femoris stretching technique.

The main objective is to register if an increase in rectus femoris stretching Range of Motion, increases hamstring strength and activity due to their antagonic relationship and their relation with pelvic tilt.

Study Overview

• Status: Unknown
• Conditions: Muscle Stretching Exercise
• Intervention / Treatment: Procedure: Rectus femoris stretching

• Study Type: Interventional
• Enrollment (Anticipated): 16
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Spain
  • Zaragoza, Spain, 50018
    • Cnetro ragonés del Deporte

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 30 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion criteria:

• The athletes recruited have to be under regular training and competition
• Free of any symptoms, at least 3 days training weekly for the last three years
• Give written consent

Exclusion criteria:

- Subjects who have suffered lower limb or back injuries during those last three years

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
No Intervention: Control; 5 minutes waiting time
Experimental: Stretching; Rectus femoris static stretching during 90' (with three hold-relax progressions until final ROM)	Procedure: Rectus femoris stretching; Patient lying prone with the non-implicated leg outside the treatment table resting on the floor. Physical therapist flexes patients knee until tension is felt. In that position 5 seconds' isometric contraction is asked and physical therapist progresses in knee flexion range of motion until new tension is felt. After three contract-relax procedures physical therapist holds the range of motion for 30 seconds.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rectus femoris length	Knee flexion range of motion with inclinometer	Inmediate after intervention; up to 10 minutes
Biceps femoris strength	Dynamometry	Inmediate after intervention; up to 10 minutes
Gluteus maximus strength	Dynamometry	Inmediate after intervention; up to 10 minutes

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rectus femoris tensomyography	tensomyography	Inmediate after intervention; up to 10 minutes
Pelvic anteversion	Photometry of lateral view	Inmediate after intervention; up to 10 minutes
Sprint muscle activity	Electromyography	Inmediate after intervention; up to 10 minutes

Collaborators and Investigators

• Sponsor: Universidad de Zaragoza
• Investigators: Principal Investigator: Alazne Ruiz de Escudero Zapico, PhD, Universidad Pública de Navarra

Study record dates

Study Major Dates

• Study Start (Actual): February 15, 2020
• Primary Completion (Actual): February 25, 2020
• Study Completion (Anticipated): April 30, 2020

Study Registration Dates

• First Submitted: April 7, 2020
• First Submitted That Met QC Criteria: April 9, 2020
• First Posted (Actual): April 14, 2020

Study Record Updates

• Last Update Posted (Actual): April 16, 2020
• Last Update Submitted That Met QC Criteria: April 14, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: strength; muscle length; sprint
• Other Study ID Numbers: 2020-001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: Yes
• IPD Plan Description: All individual participant data that underlie results in a publication
• IPD Sharing Time Frame: Starting 6 months after publication
• IPD Sharing Access Criteria: Principal investigator will review requests and criteria for reviewing requests will be individually assessed
• IPD Sharing Supporting Information Type: Statistical Analysis Plan (SAP); Informed Consent Form (ICF); Clinical Study Report (CSR)

Drug and device information, study documents

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