The National Institutes of Health requires a metabolic measurement system to replace aging equipment for human physiology research on metabolic disease, including obesity and diabetes. The system must accurately measure oxygen consumption, carbon dioxide production, ventilation, and energy expenditure during both rest and physical activity. It must support resting metabolic testing and graded exercise testing, and integrate with a research-grade treadmill. No specific budget amount, performance location, or non-bid timelines are mentioned in the description. This opportunity is relevant for bidders specializing in metabolic measurement equipment for clinical research.