ArticleJournal of human kinetics2013
Bilateral and unilateral asymmetries of isokinetic strength and flexibility in male young professional soccer players.
Article in Journal of human kinetics, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
60 citing papers in PubMed, 1 synthesis or guideline pooled it, 201 citations in OpenAlex.
- Comparison of the H:Q Ratio Between the Dominant and Nondominant Legs of Soccer Players: A Meta-analysis.Sports healthPooled it
- ACL reconstruction using a quadruple semitendinosus graft with cortical fixations gives suitable isokinetic and clinical outcomes after 2 years.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Trial
- Kinesiology Taping does not Modify Electromyographic Activity or Muscle Flexibility of Quadriceps Femoris Muscle: A Randomized, Placebo-Controlled Pilot Study in Healthy Volleyball Players.Medical science monitor : international medical journal of experimental and clinical research · 2015Trial
- Neuromuscular contributions to inter-limb quadriceps strength asymmetries across contraction types in healthy adults.European journal of applied physiology · 2026Article
- Isokinetic vs. Hand-Held Dynamometry for Assessing Knee Flexor and Extensor Strength in Athletes: Evaluating a Low-Cost Alternative across the Range of Motion.Journal of human kinetics · 2026Article
- The Standing Forward Flexion Test in Manual Therapy: A Critical Review and a Functional Reinterpretation.Cureus · 2026Review
- Isokinetic evaluation of knee muscles and correlation of maximum torque of the extensors of the operated knee with thigh circumference in soccer players 2 years after ACL reconstruction: A cross-sectional study.Hong Kong physiotherapy journal : official publication of the Hong Kong Physiotherapy Association Limited = Wu li chih liao · 2025Article
- Evaluating the optimal height for hamstring activity in the maximum-speed single-leg bridge test.International journal of sports medicine · 2025Article
- The effects of two preseason periodizations on peak torque of knee extensors and flexors of a Polish first league soccer team.Scientific reports · 2025Article
- Seasonal Changes in Performance Metrics, Hormonal, Hematological, and Biochemical Markers Among Semi-Professional Soccer Players: Implications for Training and Recovery.Journal of functional morphology and kinesiology · 2025Article
- The Effect of the FIFA 11+ Warm-Up Program on Knee Instability and Motor Performance in Male Youth Soccer Players.Sensors (Basel, Switzerland) · 2025Article
- Lower-Extremity Muscle Strength Symmetry Assessment Through Isokinetic Dynamometry.Life (Basel, Switzerland) · 2025Article
- Functional and Lateral Asymmetry of the Knee Joint Muscles Measured Using Tensiomyography (TMG) in Professional Football Players of Different Playing Positions.Healthcare (Basel, Switzerland) · 2025Article
- Isokinetic muscle function, dynamic balance, and injury risk in dominant and non-dominant lower extremities of adolescent taekwondo athletes.Frontiers in sports and active living · 2025Article
- Relationship between knee isokinetic muscle strength and countermovement jump height among elite male gymnasts.Frontiers in sports and active living · 2025Article
- Hamstrings and Quadriceps Weaknesses Following Anterior Cruciate Ligament Reconstruction Persist Up to 6 Months After Return-to-Sport: An Angle-specific Strength Analysis.International journal of sports physical therapy · 2025Article
- Effects of an 8-week pre-season targeted training on sprinting performance, agility and lower limb muscular asymmetries in elite soccer players.Biology of sport · 2024Article
- Knee and Hip Muscle Strength of Male Soccer Players from Different Competitive Levels.Journal of human kinetics · 2024Article
- Resistance Training with Instability Does Not Hamper Total Training Volume and Muscle Strength Gains in Older Adults: a Secondary Analysis from REI Study.Canadian geriatrics journal : CGJ · 2024Article
- The association between unilateral and bilateral performance-related measures in elite female soccer players: a multifaceted investigation.Frontiers in physiology · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This study investigated bilateral and unilateral asymmetries of strength and flexibility in male young professional soccer players. Thirty-six soccer players (age: 18.9 ± 1.4 years) participated in this study. A Biodex Isokinetic Dynamometer was used to assess the hamstring and quadriceps strength at selected speeds of 60°/s, 180°/s and 300°/s. Hip joint flexibility was measured using a goniometer. No difference was observed in conventional strength ratio, dynamic control ratio and fast/slow speed ratio between the dominant and non-dominant legs (p>0.05). All but one of the players (97.2%) had musculoskeletal abnormality (bilateral imbalance > 10%) in one or more specific muscle groups. The dominant leg had greater hip joint flexibility compared with the non-dominant leg (108.8 ± 10.7° versus 104.6 ± 9.8°, respectively). The findings support the hypothesis that physical performance and movement pattern experienced during soccer playing may negatively change the balance of strength in both legs (bilateral strength balance), but not on the same leg of the young male professional soccer players. The results can be helpful for trainers and coaches to decide whether the players need to improve their balance and strength which in turn may prevent injury. It is suggested that in professional soccer training, quadriceps and hamstrings muscle strength, as well as hip joint flexibility should not be overlooked.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.