Background: The purpose of this study was to investigate the morphological and isokinetic strength asymmetry and magnitude in young athletes.
Methods: One hundred and thirty nine male subjects (soccer, floorball, non-athletes) were measured for proportion of muscle mass between upper extremities (BADΔ) and lower extremities (BLDΔ). Moreover, the peak muscle torque of knee extensors (PTE) and flexors (PTF), ipsilateral (H:Q) and bilateral strength ratio (Q:Q, H:H) were measured.
Results: We found significant differences in observed parameters with respect to different sport activities (F = 13.02, p = 0.00, = 0.80). Higher values of BADΔ were observed in the non-active (0.19 ± 0.11 kg) group compared with soccer players (0.10 ± 0.11 kg). We found a lower value of BLDΔ in floorball players (0.32 ± 0.11 kg) compared with soccer players (0.58 ± 0.27 kg) and non-active boys (0.63 ± 0.28 kg). Results revealed significantly higher PTE in soccer players compared with non-active boys and floorball players and higher Q:Q ratio in soccer players (10.99 ± 7.75%) compared with non-active boys (7.47 ± 5.92%).
Conclusions: This study revealed that there are morphological and strength asymmetries in the observed groups, which may have potential maladaptive effects (e.g. uncompensated overload of extremity) in athletes affected by specific load.
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http://dx.doi.org/10.1515/med-2019-0014 | DOI Listing |
Antioxidants (Basel)
January 2025
Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy.
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View Article and Find Full Text PDFActa Ortop Mex
January 2025
Universidade de Ribeirao Preto Campus Guarujá. Guarujá (SP), Brazil.
The iliotibial band originates from the iliac crest and the hip joint capsule, extending along the entire lateral surface until it inserts onto tuberculum anterolateralis tibiae on the anterolateral tibia. It acts as an agonist of the anterior cruciate ligament. In short, the iliotibial band primarily contributes to the lateral stabilization of the knee joint.
View Article and Find Full Text PDFEur J Neurosci
January 2025
Faculty of Physical Activity and Sport Sciences (INEF), Sports Department, Universidad Politécnica de Madrid (UPM), Madrid, Spain.
Soccer players must react quickly and execute complex mental processes to adapt to competitive scenarios while maintaining peak physical performance. Perceptual-cognitive training methods integrate reaction tasks using nonspecific visual stimuli with game-like motor actions, but the impact on explosive strength responses is unclear. This study investigates the effect of nonspecific visual stimuli with varying perceptual-cognitive constraints on jump performance, including countermovement jump height, reactive strength index modified, action time, and reaction time.
View Article and Find Full Text PDFSports (Basel)
January 2025
Escuela de Ciencias de la Actividad Física, El Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 8370003, Chile.
Background: Speed training with resisted sprints has been shown to positively affect neuromuscular performance in soccer players. Various loads, ranging from 10% to 120% of body mass, have demonstrated performance improvements across the spectrum. However, the impact of sprint distance with optimal load on these adaptive responses has yet to be thoroughly described.
View Article and Find Full Text PDFSports (Basel)
January 2025
Sport Sciences Research Centre, Universidad Rey Juan Carlos, 28943 Fuenlabrada, Spain.
To enhance athletic performance and reduce the risk of injury, load quantification has allowed for a better understanding of the individual characteristics of the physical demands on soccer players during training or competition. In this regard, it appears crucial to summarize scientific evidence to provide useful information and future directions related to the speed and acceleration profiles of male soccer players. This review aims to evaluate the findings reflected in the available literature on both profiles in football, synthesizing and discussing data from scientific articles, while providing insights into quantification methods, employed thresholds, tracking systems, terminology, playing position, and microcycle day.
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