What component of the SMART criteria is missing if a client's goal is to exercise 3 days a week but does not consider her previous activity level?

The component of the SMART criteria that is missing when a client's goal is to exercise three days a week without considering her previous activity level is the aspect of realism. Setting a realistic goal involves ensuring that it is attainable given the individual’s current circumstances, including their previous activity level and any physical or psychological barriers they may face.

When someone sets a goal, it is crucial to create an objective that aligns with their past experiences and abilities. If the target is too ambitious compared to what the person has previously achieved, this may lead to feelings of discouragement or failure. For example, if the client had been inactive for an extended period, jumping straight into exercising three days a week might not be feasible and could result in injury or burnout.

Furthermore, incorporating previous activity levels can help create goals that build upon the client's existing foundation, ensuring they feel motivated and capable of achieving success. A SMART goal should not only be specific, measurable, and time-bound but also realistic, to foster lasting behavioral change and maintain client engagement.