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Sex-specific impacts of caffeine on body composition: commentary on a retrospective cohort study.
J Int Soc Sports Nutr
December 2025
University of Bologna-Alma Mater Studiorum, Department of Quality of Life Sciences, Bologna, Italy.
Background: Understanding the impact of caffeine intake on body composition is a topic of growing research interest. The article "Association Between Caffeine Intake and Fat-Free Mass Index: A Retrospective Cohort Study" by Tian et al. explored this relationship, highlighting a positive correlation between caffeine consumption and fat-free mass index (FFMI).
View Article and Find Full Text PDFA Homozygous ATP2A2 Variant Alters Sarcoendoplasmic Reticulum Ca-ATPase 2 Function in Skeletal Muscle and Causes a Novel Vacuolar Myopathy.
Neuropathol Appl Neurobiol
February 2025
Department of Neurology, Neuromuscular Diseases Unit, Hospital de la Santa Creu i Sant Pau, Institut de Recerca Sant Pau (IR Sant Pau), Barcelona, Spain.
Aims: Sarcoendoplasmic reticulum Ca-ATPase 2 (SERCA2), encoded by ATP2A2, is a key protein involved in intracellular Ca homeostasis. The SERCA2a isoform is predominantly expressed in cardiomyocytes and type I myofibres. Variants in this gene are related to Darier disease, an autosomal dominant dermatologic disorder, but have never been linked to myopathy.
View Article and Find Full Text PDFNutritional Strategies for Enhancing Performance and Training Adaptation in Weightlifters.
Int J Mol Sci
December 2024
Institute of Health & Environment, Seoul National University, Seoul 08826, Republic of Korea.
Weightlifting demands explosive power and neuromuscular coordination in brief, repeated intervals. These physiological demands underscore the critical role of nutrition, not only in optimizing performance during competitions but also in supporting athletes' rigorous training adaptations and ensuring effective recovery between sessions. As weightlifters strive to enhance their performance, well-structured nutritional strategies are indispensable.
View Article and Find Full Text PDFAcute Co-Ingestion of Caffeine and Sodium Bicarbonate on Muscular Endurance Performance.
Nutrients
December 2024
Departamento de Ciencias Biomédicas, Área de Educación Física y Deportiva, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, 28801 Madrid, Spain.
Caffeine and sodium bicarbonate individually enhance muscular endurance by delaying fatigue, but their combined effects have scarcely been studied. : This study aimed to evaluate the acute effects of co-ingesting caffeine and sodium bicarbonate on muscular endurance at different loads in bench press and back squat exercises. : Twenty-seven recreationally trained participants (female/male: 14/14; age: 23 ± 3.
View Article and Find Full Text PDFAttempts to Create Transgenic Mice Carrying the Q3924E Mutation in RyR2 Ca Binding Site.
Cells
December 2024
Cardiac Signaling Center, University of South Carolina, Medical University of South Carolina and Clemson University, Charleston, SC 29425, USA.
Over 200 point mutations in the ryanodine receptor (RyR2) of the cardiac sarcoplasmic reticulum (SR) are known to be associated with cardiac arrhythmia. We have already reported on the calcium signaling phenotype of a point mutation in RyR2 Ca binding site Q3925E expressed in human stem-cell-derived cardiomyocytes (hiPSC-CMs) that was found to be lethal in a 9-year-old girl. CRISPR/Cas9-gene-edited mutant cardiomyocytes carrying the RyR2-Q3925E mutation exhibited a loss of calcium-induced calcium release (CICR) and caffeine-triggered calcium release but continued to beat arrhythmically without generating significant SR Ca release, consistent with a remodeling of the calcium signaling pathway.
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