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Unilateral vs Bilateral Isometric Training in Youth Soccer Players
Sponsor: The Jerzy Kukuczka Academy of Physical Education in Katowice
Summary
This randomized controlled trial investigates the effects of unilateral and bilateral isometric strength training integrated into an 8-week complex training program on neuromuscular performance in elite youth soccer players. Forty-one male players competing at the national level will be randomly assigned to one of three groups: unilateral isometric training (UNI), bilateral isometric training (BI), or a control group performing the same training program without additional isometric exercises. All participants will complete a structured complex strength training program once per week for eight weeks during the competitive season. Neuromuscular performance will be assessed before and after the intervention using countermovement jump height, broad jump distance, maximal isometric squat peak force and 30-m sprint time. The aim of the study is to determine whether the mode of isometric training (unilateral vs bilateral) influences adaptations in strength, power and sprint performance in youth soccer players. An additional objective of the study is to determine whether the type of isometric training intervention influences inter-limb asymmetries in neuromuscular performance. Selected tests will therefore be performed both bilaterally and unilaterally to assess potential differences between dominant and non-dominant limbs.
Official title: Effects of Unilateral and Bilateral Isometric Strength Training Integrated Into an 8-Week Complex Training Program on Neuromuscular Performance in Youth Soccer Players
Key Details
Gender
MALE
Age Range
14 Years - 19 Years
Study Type
INTERVENTIONAL
Enrollment
41
Start Date
2025-09-30
Completion Date
2025-12-11
Last Updated
2026-04-29
Healthy Volunteers
Yes
Interventions
Unilateral Isometric Training
Isometric strength exercises performed unilaterally including plantar flexion, squat, and hip extension against an immovable barbell.
Bilateral Isometric Training
Isometric strength exercises performed bilaterally including plantar flexion, squat, and hip extension against an immovable barbell.
Complex Strength Training
A structured complex training program consisting of paired resistance and ballistic exercises performed once per week for eight weeks.
Locations (1)
Academy of Physical Education in Katowice
Katowice, Silesian Voivodeship, Poland