Clinical trial NCT04289896: Plyometric Training, in the Improvement of Explosive Strength and Speed in Soccer Players
Official title: Effectiveness of an Intervention Through a Plyometric Training Program, in the Improvement of Explosive Strength and Speed in Youth Players. A Randomized Clinical Study.
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Football Player
Keywords: Football, Youth players
Plyometric exercises
Strength
Running speed
Muscular extensibility
Youth players
Lead sponsor: Investigación en Hemofilia y Fisioterapia
Sponsor class: NETWORK
First posted: 2020-02-28
Enrollment: 17
Sex: MALE
Minimum age (years): 18
Maximum age (years): 30
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: Football requires a high number of actions at high speed and intensity. The application of plyometrics can improve explosive strength and speed levels in soccer players.

The main objective of the study is to assess the effectiveness of a program based on plyometric exercises for the improvement of the explosive force in vertical jump and the speed in running with and without the ball in soccer players of youth category.

Randomized clinical study, simple blind, with follow-up period. 30 players will be randomized to the study groups: experimental and control. The intervention will last 4 weeks, with 2 weekly sessions lasting 20 minutes. The study variables will be: Vertical Countermovement Jump Test with Arms and Twenty-Centimeter Drop Jump Reactive Strength Index (Explosive Force), running speed without ball and ball (20 meter speed test), hitting speed of ball (Maximal Kicking Velocity Test), hamstring extensibility (Sit and Reach Test) and sural triceps extensibility (Leg Motion Basic). Normality will be calculated using an analysis of Kolmogorov Smirnov. With the t-student test the differences between assessments will be calculated and with an ANOVA of repeated measures, the effect between intersubject will be calculated. The effect size will be obtained with Cohen's formula.

It is expected to obtain an improvement in the explosive force in the vertical jump, as well as in the running speed with and without the ball.


Eligibility criteria: Inclusion Criteria:

* Youth soccer players federated in Castilla y León
* Over 18 years
* Male
* That they train at least twice a week.

Exclusion Criteria:

* subjects who: present a medical diagnosis of musculoskeletal lesion in the lower limb at the time of starting the study
* Who have been out of the competition for more than 6 months as a result of an injury in the last year
* That are part of the experimental phase of another study during our intervention and follow-up period
* That they do not attend at least 80% of the intervention sessions
* Not sign the informed consent document.

Primary outcomes:
measure: Change from baseline explosive force in vertical jump after treatment and at month
timeFrame: Screening visit, within the first seven days after treatment and after one month follow-up visit
Secondary outcomes:
measure: Change from baseline running speed after treatment and at month
timeFrame: Screening visit, within the first seven days after treatment and after one month follow-up visit
measure: Change from baseline ball hitting speed after treatment and at month
timeFrame: Screening visit, within the first seven days after treatment and after one month follow-up visit
measure: Change from baseline hamstring extensibility after treatment and at month
timeFrame: Screening visit, within the first seven days after treatment and after one month follow-up visit
measure: Change from baseline sural triceps extensibility after treatment and at month
timeFrame: Screening visit, within the first seven days after treatment and after one month follow-up visit
Other outcomes:
Locations:
city: Madrid
country: Spain
facility: Universidad Europea de Madrid
state: Comunity Of Madrid
Study officials:
References: