High-Intensity Interval Training for Older Adults

High-Intensity Interval Training: Impacts on Function, Neuromuscular Control, and Muscle Architecture

This study will examine differences in a 12 week high-intensity interval training regimen. The Total Body HIIT program incorporates a resistance (circuit) and an anaerobic (bike) component in older adults. The specific objectives focus on examining cardiovascular endurance, neuromuscular function, and muscle architecture.

Inclusion Criteria:

• 65-95 years of age or older
• Physical independent (Barthel Index)
• Physician clearance to participate
• No medication changes in previous 30 days
• No structured resistance training program in previous 6 months

Exclusion Criteria:

• Contraindications to high-intensity exercise39 (PAR-Q Questionnaire)
• Severe mental impairment (<18 on Montreal Cognitive Assessment)
• Neurodegenerative or acute neurological diagnoses (e.g., Parkinson's disease, stroke, traumatic brain injury)