Why was an inactive lifestyle considered problematic in Nagi's model?

Nagi's model of disability emphasizes the dynamic interplay between health conditions, functional limitations, and the broader context of disability. In this model, an inactive lifestyle is considered problematic because it can have comparable effects on the disabling process itself. This means that inactivity can exacerbate or contribute to functional limitations and disabilities, regardless of the presence of a health condition.

The model highlights that disability is not solely determined by an underlying health issue but is also significantly influenced by the individual's level of activity. When one is inactive, muscle strength, endurance, and overall physical capacity can diminish over time, leading to a cycle that reinforces disability. This highlights the importance of maintaining an active lifestyle to improve or preserve functional abilities and reduce the risk of disability.

The other options, while they may represent concerns associated with inactivity, do not directly address the core of Nagi's model regarding the relationship between lifestyle and the disabling process. For instance, although inactivity can indeed lead to obesity, encourage mental health decline, and reduce social interactions, these factors are more indirect influences rather than key components of the disabling process as outlined by Nagi. The model focuses specifically on how activity levels directly impact functional capabilities and, consequently, disability outcomes.