Strength
Conditions
Keywords
Soccer, Eccentric Force, Quadriceps, Reverse Nordic Hamstring Exercise, Vertical Jump
Brief summary
BACKGROUNDː The reverse nordic hamstring exercise is developed for the eccentric work of the rectus femoris. After performing Nordic exercise protocol (its original), the relationship between increased eccentric hamstring strength, improvements in sprint capacity and reduced incidence of injuries can be confirmed. The review of evidence, led us propose the relationship and the possible benefits that could exist in the performance of four weeks of reverse nordic exercise protocol and the vertical jump, measured with countermovement jump test (CMJ) on a platform of jump. METHODSː An open randomized controlled trial was conducted, with an intervention and control group, to which they were randomly assigned. The sample was made of 19 players from the San Antonio de Murcia Catholic University Team in the youth A category, aged between 16 and 18 years old. The experimental group (n=10) performed the reverse nordic hamstring exercise protocol for four weeks, in addition to the usual training that they shared with the control group (n=9). Data collection for the CMJ test was done before starting the protocol and immediately after finishing it for all participants. Statistical analysis was carried out with the SPSS program.
Interventions
PROCEDURENordic Reverse Protocol
The participant begins on their knees, with the trunk upright and fully aligned. At this moment, the soccer player slowly leans back, maintaining the starting position by means of a controlled flexion of the knees. This fall is executed at the lowest speed possible to maximize muscle load in the eccentric phase and reach the point of maximum flexion.
Sponsors
Universidad de Murcia
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Investigator)
Masking description
The trial was open or unblinded, the nature of the intervention prevented it from being blinded from the participants. The investigator in charge of collecting the data and carrying out the statistical study was the blind evaluator.
Intervention model description
Randomized Controlled Trial
Eligibility
Sex/Gender
MALE
Age
16 Years to 18 Years
Healthy volunteers
Yes
Inclusion criteria
* Between 16 and 18 years old * Soccer Players
Exclusion criteria
* Pathologies or Musculoskeletal Injuries in the last 6 months * Surgical Interventions in the lower extremities in the last 6 months
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Flight Time | It was performed 3 days after completing the 4-week reverse Nordic exercise protocol. | Chronojump Boscosystem® contact platform (Barcelona), to measure the vertical jump (CMJ and Abalakov) and the Chronojump Boscosystem® Software version 1.7.1 |
| Jump Height | It was performed 3 days after completing the 4-week reverse Nordic exercise protocol. | Chronojump Boscosystem® contact platform (Barcelona), to measure the vertical jump (CMJ and Abalakov) and the Chronojump Boscosystem® Software version 1.7.1 |
Countries
Spain
Outcome results
None listed