Load Control in Eccentric Exercises in Volleyball Players

Investigación en Hemofilia y Fisioterapia

Status: Completed

Conditions: Patellar Abnormality

Treatments: Other: Experimental; Other: Control

Study type: Interventional

Funder types: NETWORK

Identifiers

NCT03865862

CEX

Details and patient eligibility

About

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.

Enrollment: 40 patients

Sex: Male

Ages: 18 to 35 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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40 participants in 2 patient groups

Experimental

Experimental group

Description:

Intervention of 4 weeks, with two weekly sessions, in which the intervention will be carried out during the training, these sessions having a duration of 10 minutes. During the performance of the intervention, they will perform 3 sets of 15 repetitions of squats in a 25º inclined plane, performing the eccentric phase of the squat in a time of 4 seconds, the concentric phase in 3 seconds, and a rest of 15 seconds between series.

Treatment:

Other: Experimental

Control

Active Comparator group

Description:

Intervention of 4 weeks, with two weekly sessions, in which the intervention will be carried out during the training, these sessions having a duration of 10 minutes. During the performance of the intervention, they will perform 3 sets of 15 repetitions of squats in a 25º inclined plane, performing the eccentric phase of the squat in a time of 4 seconds, the concentric phase in 3 seconds, and a rest of 15 seconds between series.

Treatment:

Other: Control