1. Introduction
  1.1 Background
  1.2 Significance of the Study
  1.3 Research Objectives

2. Literature Review
  2.1 Age-Related Changes in Muscle Mass
      2.1.1 Sarcopenia: Definition and Prevalence
      2.1.2 Factors Contributing to Age-Related Muscle Loss
  2.2 Age-Related Changes in Muscle Strength
      2.2.1 Muscle Strength Decline with Aging
      2.2.2 Factors Influencing Age-Related Muscle Weakness
  2.3 Impact of Muscle Mass and Strength on Functional Capacity
      2.3.1 Effects on Mobility and Balance
      2.3.2 Implications for Activities of Daily Living
  2.4 Mechanisms Underlying Age-Related Muscle Decline
      2.4.1 Changes in Muscle Fiber Composition
      2.4.2 Hormonal and Metabolic Factors
      2.4.3 Inflammatory Processes
  2.5 Assessment Methods for Muscle Mass and Strength
      2.5.1 Dual-Energy X-ray Absorptiometry (DXA)
      2.5.2 Handgrip Strength Testing
      2.5.3 Other Functional Tests

3. Methodology
  3.1 Study Design
  3.2 Selection Criteria for Literature Review
  3.3 Data Collection and Analysis
  3.4 Limitations

4. Results and Discussion
  4.1 Overview of Studies Included in the Review
  4.2 Age-Related Changes in Muscle Mass
  4.3 Age-Related Changes in Muscle Strength
  4.4 Relationship between Muscle Mass, Strength, and Functional Capacity
  4.5 Underlying Mechanisms of Age-Related Muscle Decline

5. Interventions to Mitigate Age-Related Muscle Decline
  5.1 Resistance Training and Exercise Programs
  5.2 Nutritional Interventions
  5.3 Hormonal and Pharmacological Interventions
  5.4 Other Potential Strategies