Clinical trial NCT03865862: Load Control in Eccentric Exercises in Volleyball Players
Official title: Efficacy of Load Control in Eccentric Exercises in the Increase of the Cross-sectional Area and Pain Threshold of the Patellar Tendon, and of the Strength of the Quadriceps in Volleyball Players. A Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Patellar Abnormality
Keywords: Eccentric
Load control
Volleyball
Physiotherapy
Patellar tendon
Randomized clinical trial
Lead sponsor: Investigación en Hemofilia y Fisioterapia
Sponsor class: NETWORK
First posted: 2019-03-07
Enrollment: 40
Sex: MALE
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: Introduction. Vertical jump is the main movement in volleyball, and the main etiological factor of patellar tendinopathy. The eccentric exercise has been proved as the most effective intervention in improving this factor.

Aim. Annalise the effectiveness of the load control during the eccentric exercise to increase the cross-sectional area as well as the increase of the pain threshold of the patellar tendon, and the gain of the quadriceps maximum strength, in volleyball older players.

Study design. Randomized clinical study, simple blind, multicentric and with a follow-up period.

Methods. 40 volleyball players will be recruited, who will be randomized to the two groups: experimental (control of the load based on the RM during the eccentric exercise of quadriceps) and control (without load control). There will be an intervention of 4 weeks with 2 weekly seasons of 10 minutes each. The dependent variables will be: cross-sectional area (ultrasound evaluation), pain threshold in the patellar tendon (analog or digital algometer) and the maximum strength of the quadriceps (linear encoder or estimating the RM). In case of normality of the distribution of the sample, parametric tests will be used: student t-test of related samples (difference between evaluations in each rump) and repeated measures ANOVA (intra- and intergroup effect).

Expected results. To observe an increase in the cross-sectional area, pain-threshold of patellar tendon and quadriceps maximum strength.


Eligibility criteria: Inclusion Criteria:

* Volleyball players
* Federated that at the time of the study compete in clubs of the Community of Madrid
* Over 18 years old.

Exclusion Criteria:

* Present a medical diagnosis of injury or illness
* Have suffered a knee injury in the 6 months prior to the study
* Doing some pharmacological or physiotherapy treatment external to the study
* Not signed the informed consent document.

Primary outcomes:
measure: Change from baseline cross-sectional area of the patellar tendon 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 pain threshold to pressure 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 maximum strength of quadriceps 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:
affiliation: Universidad Europea de Madrid
name: Rubén Cuesta-Barriuso, PhD
role: PRINCIPAL_INVESTIGATOR
References: