Background: Physical testing is crucial for athlete monitoring, talent identification, optimizing training, and tailoring programs to enhance game-performance in elite competitions.
Hypothesis: Load-velocity (L-V) relationship variables discriminate between elite and junior volleyball players, correlate with volleyball-specific performance, and are generalizable across lower- and upper-body exercises.
Study Design: Cross-sectional study.
Level Of Evidence: Level 3.
Methods: A total of 9 elite and 11 junior volleyball players were assessed for the L-V relationship (load-axis intercept [], velocity-axis intercept [], and area under the L-V relationship line []) during the countermovement jump (CMJ) and bench press throw (BPT) exercises. Block and spike jump height, as well as standing and jumping spike speed were assessed 24 hours later.
Results: Elite players presented greater magnitude in the L-V variables ( ≤ 0.03; effect size [ES] ≥ 1.06) and higher volleyball-specific performance ( ≤ 0.03; ES ≥ 1.09) than juniors (except for CMJ and ). The L-V relationship variables were significantly associated with the block and spike jump height and jumping spike speed only in elite players ( ≥ 0.703 and ≤ 0.04 in 11 out of 18 correlations). No significant associations were observed between CMJ and BPT for any L-V relationship variable ( ≤ 581; ≥ 0.08, except for in junior players).
Conclusion: The L-V relationship is a practical procedure to assess volleyball players' maximal mechanical capacities, which are associated with volleyball-specific performance in elite players. However, these data should not be used interchangeably between playing standards or exercises.
Clinical Relevance: This information might help strength and conditioning coaches to prescribe more effective training programs that focus on developing the specific physical capacities necessary for players to potentially advance to elite status.
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http://dx.doi.org/10.1177/19417381231208706 | DOI Listing |
Radiology
December 2024
From the Oxford Centre for Clinical Magnetic Resonance Research (OCMR), Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK (L.E.M.F., M.P.C., M.J., A.S., Z.A., S.N., D.J.T., B.R., L.V.); Oncology and Haematology Centre, Churchill Hospital, Oxford, UK (A.S.); Axcella Therapeutics, Cambridge, Mass (K.A.); and Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovakia (L.V.).
Background Emerging evidence suggests mitochondrial dysfunction may play a role in the fatigue experienced by individuals with post-COVID-19 condition (PCC), commonly called long COVID, which can be assessed using MR spectroscopy. Purpose To compare mitochondrial function between participants with fatigue-predominant PCC and healthy control participants using MR spectroscopy, and to investigate the relationship between MR spectroscopic parameters and fatigue using the 11-item Chalder fatigue questionnaire. Materials and Methods This prospective, observational, single-center study (June 2021 to January 2024) included participants with PCC who reported moderate to severe fatigue, with normal blood test and echocardiographic results, alongside control participants without fatigue symptoms.
View Article and Find Full Text PDFJ Strength Cond Res
December 2024
Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain; and.
Arthroscopy
December 2024
Twin Cities Orthopedics, Edina, Minnesota, U.S.A.. Electronic address:
Purpose: To examine the role of lower extremity blood flow restriction (BFR) in the athletic population.
Methods: This study was conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement guidelines. Searches of Level I and II studies were performed on PubMed, Embase, and Cochrane databases.
J Neurol Phys Ther
January 2025
Department of Rehabilitation Sciences and Physiotherapy/Movant, Faculty of Medicine and Health Science, University of Antwerp, Antwerp, Belgium (L.V.L., A.H., and L.V.); Multidisciplinary Motor Centre Antwerp Department (M2OCEAN), University of Antwerp, Antwerp, Belgium (L.V.L., A.H., and L.V.); Apeldoorn Dizziness Centre Department, Gelre Hospitals, Apeldoorn, Gelderland, the Netherlands (H.M.K.E., T.R.S., and T.D.B); Department of Otorhinolaryngology, Leiden University Medical Center, Leiden, the Netherlands (H.M.K.E. and T.D.B.); Department of Otorhinolaryngology and Head & Neck Surgery, and Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp University Hospital, Antwerp, Belgium (V.V.R.); and Department of Primary and Community Care, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands (T.R.S.).
Background And Purpose: In individuals with unilateral vestibulopathy (UVP), physical activity (PA) is recommended to stimulate central vestibular compensation. However, the presence of fear avoidance beliefs might negatively influence PA. The objectives of this study were to investigate the relationship between fear avoidance beliefs and PA and to compare PA levels between individuals with UVP in an acute/subacute vs chronic phase.
View Article and Find Full Text PDFNat Med
December 2024
Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, Wallenberg Laboratory, University of Gothenburg, Gothenburg, Sweden.
Metabolic dysfunction-associated steatotic liver disease (MASLD) is characterized by an excess of lipids, mainly triglycerides, in the liver and components of the metabolic syndrome, which can lead to cirrhosis and liver cancer. While there is solid epidemiological evidence that MASLD clusters with cardiometabolic disease, several leading genetic risk factors for MASLD do not increase the risk of cardiovascular disease, suggesting no causal relationship between MASLD and cardiometabolic derangement. In this work, we leveraged measurements of visceral adiposity identifying 27 previously unknown genetic loci associated with MASLD (n = 36,394), six replicated in four independent cohorts (n = 3,903).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!