International Journal of Sports Physiology and Performance

Erratum. Evidence of Decreased Physical Performance During Playoff Matches: A 4-Season Study of a Liga MX Football Club
Characteristics of Elite 10-km Open-Water Swimmers: A Systematic Review
Fernández-Asensio JM, Hermosilla-Perona F, Rodríguez-Adalia L and Veiga-Fernández S
Performance in 10K open-water swimming (OWS) events is influenced by various factors including physical conditioning, biomechanics, anthropometrics, race tactics, and environmental factors.
Looking Back, Racing Forward: Four Years as Editor of IJSPP
Sandbakk Ø
Life in the Fast Lane: Performance Predictions for the Newest 50-m Events on the Olympic Games Swimming Schedule
Powell C, Pyne DB, Crowley E and Mujika I
We aimed to (1) generate performance predictions for the new 50-m backstroke, breaststroke, and butterfly events, recently added to the Olympic Games swimming schedule, for both the Singapore 2025 World Aquatics Championships and the Los Angeles 2028 Olympic Games and (2) evaluate the accuracy of this already-established predictive model for these new events, using performances at the Singapore 2025 World Aquatics Championships as the criterion.
Return-to-Play Criteria Following a Hamstring Injury in Professional Soccer: Time for a Tailor-Made Approach
Perna P, Kerin F, MacDonald B, Jokela A, Lempainen L and Beato M
A hamstring injury rehabilitation and return-to-play (RTP) individualized approach based on the anatomical structure involved, the location of the injury, and the mechanism of injury is still missing in most studies. RTP criteria should be chosen following the same principles and the complexity of the injury and should receive more attention from the scientific community given that reinjury risk is one of the main challenges associated with hamstring rehabilitation. The available literature is mainly based on articles in which hamstring injuries are treated as a whole without making distinctions for their specific characteristics.
Interlimb Asymmetries in Football Players With Coordination Impairments: Implications for Classification and Training
Henríquez M, Sadarangani KP, Cornejo MI, Peña-González I, Yanci J and Reina R
Football requires complex motor tasks to be performed under intermittent conditions, often involving asymmetrical movement. In footballers with cerebral palsy (CP), asymmetries are influenced by neuromuscular impairments, yet their role in performance differentiation across sport classes remains unclear. The objective of this study was to quantify interlimb differences and asymmetries in unilateral vertical and horizontal jump and change-of-direction (COD) performance among footballers with CP and to examine variations across different sport classes.
Advanced Footwear Technology Slows Oxygen Uptake Drift and Reduces Neuromuscular Fatigue During Extended Running
Steele J, VanKeersbilck L, Ward JB and Hunter I
To evaluate whether advanced footwear technology (AFT) reduces the rise in oxygen uptake (V˙O2) and neuromuscular fatigue during extended submaximal running compared with traditional running shoes.
Methodological Insights Into the Acceleration-Speed Profile: Optimizing Data Analysis for Reliable Application in Elite Female and Male Football
Alonso-Callejo A, Manzano JM, Garcia-Unanue J, Guitart M, Carles B, Gallardo L and Felipe JL
This study aimed to evaluate the reliability of the acceleration-speed profile in elite male and female football players across 3 competitive seasons. Specifically, we assessed how the number and type of microcycles influence the reliability of theoretical maximal acceleration (A0) and speed (S0).
Assessing the Relationship and Convergent Validity of Player Load and Dynamic Stress Load in Basketball: A Multivariable Regression Analysis
García F, Vicens-Bordas J, Dawson L, Jaward MH, Espasa Labrador J and Beato M
This study aimed to assess the strength of the relationship between Player Load and dynamic stress load (DSL); to evaluate the convergent validity between Player Load, DSL, and other external-load parameters in basketball; and to develop multiple-regression models to explain the relative importance of different external-load parameters to Player Load and DSL.
Acute Metabolic, Mechanical, and Perceptual Responses to Curve Versus Linear Repeated-Sprint Training in Highly Trained Youth Soccer Players
Baena-Raya A, Ruiz-Zaragoza JM, Díez-Fernández DM, Rey E, Soriano MA, Pérez-Castilla A, Rodríguez-Pérez MA and Padrón-Cabo A
This study aimed to (1) evaluate the acute metabolic, mechanical, and perceptual responses to curve versus linear repeated-sprint-training (RST) protocols in highly trained youth soccer players and (2) analyze whether the sprint trajectory influences the time course of recovery following RST protocols.
Acknowledge the Merits and Limitations of Exercise Quantification Methods to Better Control the Dose-Response Relationship
Desgorces FD, Gouelle A and Noirez P
Achieving a consensus on methods for exercise quantification appears to be a challenging endeavor in sport science. Quantification of exercise enables the description of training in unit doses by coaches and scientists, facilitating subsequent analysis of responses to training.
Perspectives of World-Class Endurance Coaches on the Evolution of Athlete Training and Performance
Sandbakk Ø, Herzog S, McGawley K, Pyne DB, Talsnes RK, Millet GP, Solli GS, Seiler S, Laursen PB, Haugen T, Tønnessen E, Wilber R, Foster C, van Erp T, Stellingwerff T, Holmberg HC and Bucher Sandbakk S
To provide insights into the key practices driving the evolution of endurance training and performance.
Identifying Relevant Countermovement-Jump Parameters for Academy Soccer Players
Suarez-Balsera C, Figueiredo P, Bishop C and Rago V
This study aimed to determine the reliability and relevance of key countermovement-jump parameters in academy soccer players.
The Protective Effect of High-Pressure Ischemic Preconditioning on Rowing Performance During Consecutive 2000-m Efforts
Weng MC, Lee PC, Dai X, Chiu CH, Ho CC, Hsu SM and Chen CH
This study examined the effects of low- and high-pressure ischemic preconditioning (LIPC and HIPC) on muscle oxygenation, physiological responses, and performance during repeated 2000-m rowing trials. This was a counterbalanced, repeated-measures crossover study.
Wearable-Derived Sleep and Physiological Metrics Are Associated With Performance in Professional Golfers
Grosicki GJ, von Hippel W, Fielding F, Kim J, Chapman C and Holmes KE
Elite golf performance hinges on physiological and psychological precision, with success often defined by razor-thin margins. Sleep and cardiac autonomic function, reflected by resting heart rate (RHR) and heart-rate variability (HRV), are indicators of recovery and readiness, yet their role in golf remains understudied.
Standardizing Fatigue in Resisted-Sprint Training: The Role of a Time-Based Training Approach
Galiano C, Páez-Maldonado JA, Jiménez-Roldán MJ, Ortega-Becerra M and Pareja-Blanco F
Studies comparing acute responses after resisted-sprint training (RST) have traditionally used running distances for prescribing volume. The aim of this study was to compare the acute responses to heavy and light sled RST loads where volume was matched by sprint time instead of distance.
Developing Evidence-Based Recommendations Surrounding Training During and Following Pregnancy in Elite Athletes
Adams WM, Anderson T, Post EG, Christopher SM, McKay AKA, Donaldson AT, Galán-López N, Finnoff JT, Carter S and Taylor L
The representation of females in sport and exercise-science literature remains limited, prompting focused efforts to expand the breadth of research in the field, particularly surrounding training and competition during and following pregnancy in elite athletes. Much of the existing literature on this topic provides little to no guidance for females, coaches, health-care personnel, and high-performance staff on how to most appropriately develop effective and healthy training programs during the perinatal period. Purpose: This brief review provides insight into the current literature surrounding exercise-related factors and navigating perinatal lifespan stages in elite athletes, as well as offering a call to action for scientists and clinicians to develop and explore impactful research questions on these topics. Conclusions: In order to deliver evidence-informed care to perinatal athletes, it is vital to take an interdisciplinary and comprehensive approach that focuses on the physiological changes occurring during and following pregnancy, exercise training, nutrition, environmental stressors, and injury prevention and care. Furthermore, concerted efforts to expand the breadth and depth of health- and performance-related research for perinatal athletes are needed to ensure that these athletes receive proper evidence-informed guidance.
Determinants of Sleep and Morning Alertness in Elite Short-Track Speed Skaters During the Preseason
Varesco G, Renaud-Roy A, Germain M, Szocs S, Pattyn N, Bieuzen F and Simonelli G
Sleep in elite athletes could be compromised by stressors such as high training volumes and mediated by factors related to individual characteristics and training schedule. However, longitudinal real-world data capturing the factors influencing sleep in elite athletes remain scarce. We aimed to determine what predicts sleep quantity, sleep quality, and morning cognitive readiness in elite speed skaters of the Canadian short-track World Cup team.
Comparison of Sex-Related Activity Profile and Neuromuscular Fatigue After a Badminton-Specific Training Session
Álvarez-Dacal F, Seguí-Urbaneja J, Soriano MA, Herrero-Molleda A, Gil-Calvo M, Rodríguez-Fernández A and Fernández-Fernández J
To examine sex-related differences in activity profile and neuromuscular fatigue during a badminton-specific multifeeding training session in elite junior players.
Caffeinated Chewing Gum Improves Sympathetic Nerve Activity and Wrestling Performance: A Double-Blind Crossover Trial
Tzeng GJ, Lin HY, Shiu YJ, Hsieh MH, Chen ZC and Chiu CH
This study investigated the effect of caffeinated chewing gum on sympathetic nerve activity and simulated wrestling performance.
Comparison of Sprint- and Jump-Performance Outcomes 6 Hours Following Sprint-Priming Stimuli Involving Different External Loads
Holmberg PM, James LP, Connick MJ, Lamont HS, Watts DG and Kelly VG
This study aimed to (1) compare sprint- and jump-performance outcomes 6 hours following sprint-priming stimuli involving different external loads and (2) investigate whether maximal dynamic strength level influences sprint-priming outcomes.