Resistance Training for Special Populations: A Universal, Clinically Safe, and Scalable Framework for Progressive Training

Resistance training is consistently underutilized and underdosed among individuals with chronic disease, musculoskeletal limitations, cancer survivorship, and aging-related decline. Although these groups are often assumed to require condition-specific programs, most present with multiple comorbidities, diverse stages of disease progression, and different symptom patterns. This article outlines a universal, clinically safe resistance training framework grounded in the same sequence used for all adults: screening, assessment, initiation through a structured familiarization phase, and ongoing progression via flexible linear and non-linear periodization. Auto-regulation and individualized modifications allow training to be tailored safely by inserting the appropriate medical or musculoskeletal precautions without changing the core structure of the program. This model improves confidence, reduces fear-based underdosing, and reliably develops the primary physiological adaptations, including strength, conditioning, power, and lean mass that drive improved function, metabolic health, resilience, and quality of life across populations and age groups.