Plyometric Exercises Versus Isometric Exercises With Theraband Elastic Band in Water Polo Players
Condition: Muscle Loss
Study type: Interventional

Summary: 
      Introduction: The improvement of strength affects muscle volume, dynamic stability and sports
      performance in water polo athletes. Plyometric exercises can improve biomechanics,
      performance and the most explosive actions during sports. The work done with elastic bands
      will increase the effectiveness and the resistance on the isometric exercises developed.

      Objectives: To evaluate the effectiveness of plyometric exercises in the increase of
      quadriceps muscle strength, volume and stability dynamic in female athletic of water polo
      players from 18 to 25 years old.

      Study Design: A randomized, multicentric, single-blind clinical study with a follow-up
      period.

      Methodology: 25 water polo players will be recruited and randomly assigned to the two study
      groups: experimental (plyometric exercises plus isometric exercises with elastic bands) and
      control (isometric exercises with elastic bands). The intervention will last for 8 weeks,
      with 3 weekly sessions, of 15 minutes each. The study variables will be: strength (measured
      with the RM test), muscle volume (using anthropometry), and dynamic stability (through the
      SEBT test). The analysis of normality will be carried out with the Shapiro Wilk test. In case
      of homogeneity of the groups, we will use parametric tests: t-student test of repeated
      measures (difference between evaluations) and ANOVA of repeated means (intra and intersubject
      effect).

      Expected Results: It is expected to observe improvement in muscle strength and quadriceps
      volume, as well as dynamic stability.
    


Intervention name(s): Experimental; Control
Intervention type(s): Other; Other
Intervention description(s): The Drom Jump technique with the legs flexed will be performed with the patient standing in front of a bench 30 cm high by 100 cm wide. The physiotherapist will be placed lateral to the athlete. The subject will be asked to jump up from the box or bench, with the hip and knees in semi-reflexion, with his hands on his hip and he will be asked for an explosive jump, followed by a jump downwards falling the floor of the same way.
The technique of lateral jumps on cones will be carried out by means of unipodal jumps, achieving a distance of 50 cm between cones. The physiotherapist will stand in front of the athlete. The subject will be asked to perform a lateral unipodal explosive jump by flexing the hip and knee.; Elastic bands will be combined with isometric exercises in 3 sets of 10 repetitions each. The exercises they will perform are front squat. On the one hand, separating the legs at the height of the shoulders with hip and knee flexion, with the elastic band above the knees, maintaining the position 20 seconds.
In the following exercise, with the elastic band on the ankle, in unipodal support at the same time that the contralateral limb is free of support, the hip will be flexed at 45º with full knee extension, requesting the athlete to keep the tension 20 seconds, performing 3 sets of 10 repetitions.
Other intervention name(s): Plyometric exercises; Isometric exercises
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary purpose: Prevention
Keywords: Strengthening; Stability; Muscle Volume; Physical Effort; Randomized clinical trial