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Background: This study aims to propose an alternative solution for determining the optimal training load to meet the high physiological demands of football, encompassing both metabolic and locomotor loads. To this end, two different formats, repetitive sprint training (RST) and sided games (SGs), were evaluated in terms of energy cost (EC), and their similarities were revealed.
Methods: The study was conducted with 21 men soccer players (age: 18.24 ± 0.63 yrs, training age: 7.24 ± 0.63 yrs, body weight: 73.01 ± 7.47 kg). RST and various-sided games (4 × 4 small-sided games and 6 × 6 medium-sided games) were played according to the rules, with goalkeeper and ball possession rules tailored to different field dimensions. Both training methods were performed separately on matchday + 4 / -3 within a weekly cycle. While all SGs work for 420 s and rest for 4 min, RST performed 720 m. with 20 s rest between bouts and 4 min between sets. EC was measured using global positioning system technology during all training sessions, considering total and equivalent running distance.
Results: The study demonstrated that the 4v4 + Goalkeeper SSG and RST energy cost results EC cost results in similar conditioning improvement (5917.76 J/kg and 6181.00 J/kg, respectively).
Conclusion: As a result of the study, 4v4 + Gk SSG showed similar results regarding energy cost with RST. Additionally, it was determined that metabolic demands increased as the number of players decreased in SGs with constant m² per player.
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http://dx.doi.org/10.1186/s13102-025-01278-0 | DOI Listing |
J Phys Chem Lett
September 2025
College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, P. R. China.
Aqueous zinc-ion microbatteries exhibit promising prospects for wearable devices due to their high safety and cost-effectiveness but face challenges such as low energy density and short cycle life. To address these challenges, a dual-plating flexible Zn-Br microbattery was developed using freestanding MXene films as a zinc metal free anode. The MXene anode retains no redundant Zn, as Zn from the electrolyte undergoes deposition/stripping reactions on its substrate, thereby eliminating the necessity for excess zinc.
View Article and Find Full Text PDFJ Chem Inf Model
September 2025
Department of Chemistry, Delaware State University, Dover, Delaware 19901, United States.
The calculation of the highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap for chemical molecules is computationally intensive using quantum mechanics (QM) methods, while experimental determination is often costly and time-consuming. Machine Learning (ML) offers a cost-effective and rapid alternative, enabling efficient predictions of HOMO-LUMO gap values across large data sets without the need for extensive QM computations or experiments. ML models facilitate the screening of diverse molecules, providing valuable insights into complex chemical spaces and integrating seamlessly into high-throughput workflows to prioritize candidates for experimental validation.
View Article and Find Full Text PDFLangmuir
September 2025
Laboratory of Electrochemistry-Corrosion, Metallurgy and Inorganic Chemistry, Faculty of Chemistry, USTHB, BP 32, 16111, Algiers, Algeria.
Azo dyes, prevalent in various industries, including textile dyeing, food, and cosmetics, pose significant environmental and health risks due to their chemical stability and toxicity. This study introduces the synthesis and application of a copper hydrogen-π-bonded benzoate framework (Cu-HBF) and its derived marigold flower-like copper oxide (MFL-CuO) in a synergetic adsorption-photocatalytic process for efficiently removing cationic azo dyes from water, specifically crystal violet (CV), methylene blue (MB), and rhodamine B (RhB). The Cu-HBF, previously available only in single crystal form, is prepared here as a crystalline powder for the first time, using a low-cost and facile procedure, allowing its application as an adsorbent and also serving as a precursor for synthesizing well-structured copper oxide (MFL-CuO).
View Article and Find Full Text PDFJ Phys Chem A
September 2025
Institute of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, ul. Grudzia̧dzka 5, 87-100 Toruń, Poland.
A virtually no-cost method is proposed that can compute the correlation energies of general, covalently bonded, organic, and inorganic molecules (including conjugated π-electron systems) with a well-defined dominant Lewis structure at the accuracy of 99.5% of the near-exact values determined by the coupled-cluster singles, doubles, and perturbative triples [CCSD(T)] in the complete-basis-set (CBS) limit. This Correlation Energy Per Bond (CEPB) method assigns a partial correlation energy to each bond type (characterized by the identities of the two atoms forming the bond and its integer bond order) and to a lone pair, regardless of the bond length, bond angle, sp-hybridization, π-electron conjugation, ionicity, noncovalent interactions, etc.
View Article and Find Full Text PDFLakartidningen
September 2025
docent, överläkare, ortopedkliniken, Universitets-sjukhuset Örebro.
Spinal fractures are common, and distinct epidemiological patterns are well-known.In the young to middle age, high energy trauma is the most common etiology, and men are more afflicted than women. In the geriatric population, osteoporotic vertebral fractures are common, and in this age category the women are most often affected.
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