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
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 40
- 试验地点
- 2
- 主要终点
- Change from baseline cross-sectional area of the patellar tendon after treatment and at month
研究概览
简要总结
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Volleyball players
- •Federated that at the time of the study compete in clubs of the Community of Madrid
- •Over 18 years old.
排除标准
- •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.
结局指标
主要结局
Change from baseline cross-sectional area of the patellar tendon after treatment and at month
时间窗: Screening visit, within the first seven days after treatment and after one month follow-up visit
The assessment of the cross-sectional area of the patellar tendon will be assessed by ultrasound measurement. The player must be in the supine position, with the lower limbs resting on a wedge while maintaining a knee flexion of 15-20º. The physiotherapist will make a measurement with the transversal axis of the ultrasound, 1 cm distal to the lower pole of the patella, and with the longitudinal axis to 0.5cm distal of the same pole. In spite of performing the measurement of both lower limbs, only the data of the cross-sectional area of the patellar tendon of the dominant lower limb used by the athlete during the landing of the jump while playing will be analyzed. The unit of measurement will be the centimeter. A higher score in the post-treatment evaluation indicates an improvement in the cross-sectional area of the patellar tendon.
次要结局
- Change from baseline maximum strength of quadriceps after treatment and at month(Screening visit, within the first seven days after treatment and after one month follow-up visit)
- Change from baseline pain threshold to pressure after treatment and at month(Screening visit, within the first seven days after treatment and after one month follow-up visit)