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

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT04344691

Enrollment

Registered

2020-04-14

Start date

2020-02-15

Completion date

2020-04-30

Last updated

2020-04-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Muscle Stretching Exercise

Keywords

muscle length, strength, sprint

Brief summary

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.

Interventions

PROCEDURERectus 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.

Study design

Allocation

NON_RANDOMIZED

Intervention model

SINGLE_GROUP

Primary purpose

PREVENTION

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 30 Years

Healthy volunteers

Yes

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

Design outcomes

Primary

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

Secondary

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

Countries

Spain

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026