Seven healthy male subjects were studied under control conditions and following 5-6 months of heavy resistance training and 5-6 weeks of immobilization in elbow casts. Cross-sectional fibre areas and nuclei-to-fibre ratios were calculated from cryostat sections of needle biopsies taken from triceps brachii. Training resulted in a 98% increase in maximal elbow extension strength as measured by a Cybex dynamometer, while immobilization resulted in a 41% decrease in strength. Both fast twitch (FT) and slow twitch (ST) fibre areas increased significantly with training by 39% and 31%, respectively. Immobilization resulted in significant decreases in fibre area by 33% for FT and 25% for ST fibres. The observed nuclei-to-fibre ratio was 10% greater following the training programme. However, this change was non-significant. There was also a non-significant correlation between the magnitude of the changes in fibre size and the changes in maximal strength following either training or immobilization.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/BF00421352 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
When is synthetic sufficient? Ethical considerations and alternatives in simulation-based ultrasound education.
Adv Simul (Lond)
January 2025
RCSI SIM Centre for Simulation Education and Research, RCSI University of Medicine and Health Sciences, Dublin, Ireland.
Simulation-based education (SBE) has become an integral part of training in health professions education, offering a safe environment for learners to acquire and refine clinical skills. As a non-ionising imaging modality, ultrasound is a domain of health professions education that is particularly supported by SBE. Central to many simulation programs is the use of animal models, tissues, or body parts to replicate human anatomy and physiology.
View Article and Find Full Text PDFA reduction-secretion system contributes to roxarsone (V) degradation and efflux in Brevundimonas sp. M20.
BMC Microbiol
January 2025
School of Laboratory Animal & Shandong Laboratory Animal Center, Shandong First Medical University, Shandong Academy of Medical Sciences, Ji'nan, Shandong, 250117, China.
Roxarsone (V) (Rox(V)) is an organoarsenical compound that poses significant risks to aquatic ecosystems and various diseases. Reducing trivalent 3-amino-4-hydroxyphenylarsonic acid (HAPA(III)) offers a competitive advantage; however, it leads to localized arsenic contamination, which can disrupt the soil microbiome and impede plant growth. Three genes, BsntrA, arsC2, and BsexpA, encoding nitroreductase, arsenate reductase, and MFS transporter, respectively, were identified in the Rox(V)-resistant strain Brevundimonas sp.
View Article and Find Full Text PDFExercise type and settings, quality of life, and mental health in coronary artery disease: a network meta-analysis.
Eur Heart J
January 2025
Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Carretera de Alfacar, S/N 18071, Granada, Spain.
Background And Aims: Individuals with coronary artery disease have poorer mental health, health-related quality of life (HR-QoL), and cognition compared with (age-matched) controls. Exercise training may attenuate these effects. The aim is to systematically review and meta-analyse the effects of different exercise types and settings on brain structure/function, cognition, HR-QoL, mental health (e.
View Article and Find Full Text PDFEffects of Resistance Training on Muscular Adaptations and Inflammatory Markers in Overweight and Obese Men.
Med Sci Sports Exerc
November 2024
Université Clermont Auvergne, CNRS, LaPSCo, Physiological and Psychosocial Stress, CHU Clermont-Ferrand, University Hospital of Clermont-Ferrand, Preventive and Occupational Medicine, Witty Fit, Clermont-Ferrand, FRANCE.
Purpose: Obesity may blunt exercise responsiveness to improve muscular adaptations. The effect of resistance training (RT) targeting different body regions on muscle and inflammatory markers is unclear. This study aimed to investigate the impact of upper (upper body exercises), lower (lower body exercises), or combined (upper body + lower body exercises) RT on muscle and inflammatory markers, body composition, and performance in overweight and obese men.
View Article and Find Full Text PDFReduced Lower Body Muscular Strength and Endurance among Adult Survivors of Childhood Cancer.
Med Sci Sports Exerc
November 2024
Division of Pediatric Oncology/Hematology, University Children's Hospital Basel, University of Basel, Basel, SWITZERLAND.
Introduction: Impaired physical fitness is a possible late effect among adult survivors of childhood cancer (ASCC). Our study describes lower body muscular strength and endurance among ASCC using the 1-minute sit-to-stand (1-min STS) test, compares them with the general population, identifies risk factors, and describes changes over time.Methods: In a prospective multicenter cohort study, we invited ASCC ≥18 years of age at study, diagnosed between ages 0-20 treated in five pediatric oncology centers across Switzerland from 1976-2017 who survived ≥5 years for a 1-min STS test.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!