What term describes the gradual increase in body fat due to aging and lack of physical activity?

Creeping obesity is a term that specifically refers to the gradual increase in body fat that many people experience as they age, often exacerbated by a decrease in physical activity. As individuals progress through life, metabolic rates may decline, and lifestyle changes can lead to less energy expenditure. If caloric intake does not adjust accordingly or physical activity falls short, it can result in a slow and steady weight gain characterized by an increase in body fat.

This concept emphasizes that the weight gain is incremental and often goes unnoticed until it reaches a significant amount, which is different from sudden or dramatic weight gain that might be associated with other phenomena. The terminology underscores the importance of maintaining an active lifestyle to prevent this gradual accumulation of body fat, especially as one ages. The other terms listed do not specifically capture this gradual process in the same way.