UPLC-MS and multivariate analysis reveal metabolic pathway adaptations to training in professional football players.

Metabolomics provides direct insights into biological processes by analyzing metabolites. While univariate and multivariate analyses, alongside pathway and functional analysis tools like mummichog, are commonly employed, integrating these results to interpret biological significance remains a challenge, limiting the potential of metabolomic analyses. This study introduces innovative methods to analyze metabolic adaptations in professional football players using a unique UPLC-TOF-MS dataset comprising 93 urinary samples collected over a 10-month football season.

Does accumulated physical load in different time windows affect hamstring injuries in elite football players?

Background: This study aims to investigate how accumulated training load over different time windows (7, 14, and 28 days) influences the incidence of hamstring injuries in elite football players.

Methods: A descriptive and longitudinal study was developed in 343 players in three teams (2 Team, U-19 team, and U-18 team) from the academy of an elite football club in Spanish La Liga that also competed in the Union of European Football Associations Champions League during four seasons, from 2017/18 to 2020/21. External load variables (total distance, high-speed running, accelerations, etc.

Neuromuscular and biochemical responses of the hamstrings to a in women and men.

The purpose of the study was to analyze hamstrings muscle damage and recovery after a novel (FRBD) exercise using neuromuscular tests and associated biochemical markers of structural damage. Maximal voluntary isometric contraction (MVIC) torque and rate of force development (RFD) over several time-intervals by the : (standing isometric test for the hamstrings) and range of motion (ROM) (combination of and ), together with serum biomarkers of muscle damage and oxidative stress, were tested at baseline and  +24h,  +48h and  +72h in healthy, untrained and physically active 15 females (age= 21.5±3.

Football (soccer) match-derived hamstring muscles residual fatigue can be monitored using early rate of torque development.

Purpose: The aim of this study was to determine whether a soccer match affects the rapid force-generating capacity of the hamstring muscles, given their key role in both horizontal ground reaction force production during sprint biomechanics, and in the deceleration of the shank during the late swing phase, where rapid force production is essential owing to time constraints. Therefore, the research objective was to determine soccer match-induced hamstrings residual fatigue and recovery through rate of torque development (RTD) and associated biochemical parameters.

Methods: The recovery kinetics of hamstrings RTD metrics by the 90°:20° test, together with serum biomarkers (creatine kinase, mitochondrial creatine kinase, transaminases, malondialdehyde, irisin), were assessed in 19 male, regional first-division soccer players (age = 20.