Skip to main content
OpenTrials
Completed

NCT Number: NCT03862508

Plyometric Work Together With the Use of Ballast Weight in Lower Limbs in the Improvement of Performance in Jumpers

Introduction. The high jump is a discipline that use the shortening-stretching cycle. Plyometric exersices emply an eccentric load followed by concentric contraction. Powerinstep is a tool training by means of weigthed weigth whose objective is improving performance in athletes.

Aim. Evaluate efficacy of plyometric training with Powerinstep® in lower limbs, in the performance improvement in professional height jumpers from 18 to 40 years old.

Study design. Non-randomized clinical trial, single bind, with follow-up period.

Methods. 20 athletes will be recruited, that will be randomized to the two study groups: experimental (they carry out a plyometric training programme with Powerinstep) and control (won't be made a intervention on the subjects included in this group). The intervention consists of 6 week, with 2 session for week of 15 minutes duration each. The dependent variables will be the height of the jump, the time of flight, the reaction speed and the impulse force, measures though a pressure platform (model T-PLATE), employing Countermovement Jump, Abalakov and Drop Jump tests. We will make a descriptive statistical analysis. The Shapiro-Wilk statistical test will be used to calculate normality. Trough t-student test of repeated measures and an ANOVA of repeated measures will be calculated the difference between distinct assessment (preintervention, postintervention and follow-up) and the effect intra and inter subject, respectively.

Expected results. We want to observe the changes in performance improvement in height jumpers.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Athletes

Age range

18 year–40 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Universidad Europea de Madrid

Madrid, Comunity of Madrid, 28670, Spain

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Height jumpers
  • Age between 18 and 40 years
  • Currently participate in the competitive field

Exclusion criteria

  • Present medical diagnosis of musculoskeletal pathology
  • Who have not had musculoskeletal injuries in the last month
  • Not signed the informed consent document.

Treatment and study plan

Plyometric exercises

Other

Jump Drop Jump, dropping the subject from a height of 30cm and then make a vertical jump.

Long jumps asking the athletes to take momentum and make a leap forward trying to reach the greatest possible distance.

Jump Countermovement jump unilaterally, alternating the lower extremities. Jumps 180º with the athletes maintaining a semi-squat position. Jump Countermovement jump repeatedly starting from an upright position and the upper extremities in both hips.

All the exercises will be done through 8 repetitions per session during the first two weeks, increasing two repetitions every two weeks (until reaching 12 repetitions at the end of the intervention).

For the realization of each one of the exercises, the ballasted weight will be used (Powerinstep® model).

Other names: Plyometric training programme with Powerinstep

Primary outcomes

  1. Change from baseline jump height after intervenion and at month

    Time frame: Screening visit, within the first seven days after treatment and after one month follow-up visit

    The height of the jump will be measured on the Countermovement Jump test. The evaluating physiotherapist will stand in front of the subject, who will start from an upright position with the arms on both hips, and will go to a position of flexion of lower members at 90º. Finally, we will ask the subject for a vertical jump on the pressure platform. The results of this test are measured in centimeters and the higher the score, the greater the vertical jump capacity.

Secondary outcomes

  1. Change from baseline impulse force after intervention and at month

    Time frame: Screening visit, within the first seven days after treatment and after one month follow-up visit

    The impulse force will be measured with the Abalakov test. The evaluator will be placed in front of the evaluated, previously in an upright position, asking him to go to a position of flexion of lower limbs of 90º and then, assisted by the impulse of the arms, perform a jump on the pressure platform. The unit of measurement of the results of this test is the Newton, indicating a higher score indicates a greater impulse of the jump.

  2. Change from baseline vertical jump after intervention and at month

    Time frame: Screening visit, within the first seven days after treatment and after one month follow-up visit

    The vertical jump will be measured with the Drop Jump test. In this test, the physiotherapist will stand in front of the subject, who in an upright position will be dropped from a height of 30 centimeters on the pressure platform, then performing a vertical jump with the help of the arms. The results, in this test, are measured in centimeters, where a higher score indicates a greater vertical jump.

Sponsors and collaborators

Lead sponsor

Investigación en Hemofilia y Fisioterapia

Network

Registry information

Official study title

Efficiency of Plyometric Work Together With the Use of Ballast Weight in Lower Limbs in the Improvement of Performance in Jumpers From 18 to 40 Years Old. Nonrandomized Pilot Study.

Acronym: PLIO

Important dates

Study start
2019
Primary completion
2019
Study completion
2019
First posted
Mar 5, 2019
Registry last updated
Jan 27, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.