Related Experiment Video
Updated: Jun 12, 2025

The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
Published on: February 21, 2025
Sarcopenia
Avan A Sayer1,2, Rachel Cooper3,4, Hidenori Arai5
1AGE Research Group, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK. avan.sayer@newcastle.ac.uk.
Sarcopenia, the age-related loss of muscle mass and function, affects 5-10% of the population. New diagnostic approaches emphasize muscle strength, with resistance exercise as a primary treatment.
Area of Science:
- Gerontology
- Muscle Physiology
- Aging Research
Background:
- Sarcopenia is the accelerated loss of skeletal muscle mass and function, primarily associated with aging.
- It impacts physical function, mobility, and increases risks of falls, fractures, and mortality.
- Prevalence ranges from 5-10% in the general population, with varying definitions.
Purpose of the Study:
- To explore a life course framework for understanding sarcopenia development and prevention.
- To review sarcopenia pathophysiology in light of aging hallmarks.
- To discuss the evolving diagnostic approaches and treatment strategies for sarcopenia.
Main Methods:
- Literature review on sarcopenia definition, diagnosis, and treatment.
- Analysis of the role of aging hallmarks in sarcopenia.
- Discussion of a life course perspective on sarcopenia.
Main Results:
- Growing consensus on diagnosing sarcopenia, with increased focus on muscle strength.
- Resistance exercise is the primary treatment, but not universally suitable.
- A life course framework offers insights into prevention.
Conclusions:
- An internationally agreed definition and diagnostic approach for sarcopenia is anticipated.
- Adjunctive and alternative treatments are needed to improve quality of life.
- Understanding sarcopenia across the life course is crucial for effective prevention and management.
Related Concept Videos
Cross-bridge Cycle
Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Disorders of the Skeletal Muscle
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Overview of Protein Metabolism
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
The Functions of the Skeletal System

