04/03/2026
https://pubmed.ncbi.nlm.nih.gov/29412436
Sarcopenia is a condition characterized not only by the age-related loss of skeletal muscle mass but also by declines in muscle strength and physical function. In 2016, the assignment of an ICD-10-CM code (M62.84) officially recognized sarcopenia as a distinct disease rather than a normal part of aging. This shift has significant implications for how the condition is understood, diagnosed, and treated—particularly highlighting the critical role of resistance training.
A key issue in sarcopenia is not simply the reduction in muscle mass, but the decline in muscle strength and functional capacity. Research emphasizes that measures such as gait speed, chair stand performance, and grip strength are central to diagnosis and prognosis. This indicates that improving functional strength, rather than focusing solely on muscle size, should be the primary goal of intervention. Within this framework, resistance training emerges as the most effective strategy for managing sarcopenia.
Evidence consistently shows that resistance training significantly improves muscle strength and physical performance. While nutritional interventions such as protein supplementation alone may have limited effects on muscle mass, combining them with resistance training leads to meaningful improvements in strength and function. This suggests that sarcopenia is largely a neuromuscular problem, requiring mechanical and neural stimulation through exercise rather than nutrition alone.
Furthermore, resistance training plays a critical role in reducing falls, maintaining mobility, and preserving independence—outcomes that are directly linked to sarcopenia. Because the condition is associated with increased risks of disability, hospitalization, and mortality, resistance training should be viewed not simply as a fitness activity, but as a primary therapeutic intervention.
Implications: A Resistance Training–Centered Approach
The recognition of sarcopenia as a disease elevates resistance training from a general fitness activity to a medical necessity.
1. Exercise as Medicine
Resistance training should be prescribed as a primary intervention for both prevention and treatment of sarcopenia. Similar to how medication is used to manage chronic diseases, resistance training becomes a foundational therapeutic strategy.
2. Emphasis on Power and Function
The goal is not merely increasing muscle mass, but improving: strength + power + functional movement
In older adults, declines in power are more strongly associated with functional limitations, highlighting the importance of velocity-based and power-oriented training.
3. Shift in Assessment Paradigm
Sarcopenia management requires performance-based assessments such as:
• Muscle strength (e.g., grip strength, 1RM)
• Physical function (e.g., gait speed, SPPB)
This reflects a shift from body composition–focused evaluation to performance-based evaluation.
4. Expanded Role of Exercise Professionals
Exercise professionals are no longer limited to fitness settings but play a key role as clinical exercise specialists.
• Integration with healthcare systems is essential
• Exercise programs function as structured treatment protocols
5. Lifespan Prevention Approach
Sarcopenia begins as early as midlife, making early intervention critical:
• Younger populations: focus on maintaining strength
• Older adults: focus on preserving function and preventing falls
Establishment of an ICD-10-CM code for sarcopenia in 2016 was an important step towards reaching international consensus on the need for a nosological framework of age-related skeletal muscle decline. The International Conference on Frailty and Sarcopenia Research Task Force met in April 2017 to dis...
