What behavior best suggests that a client is coping effectively with a diagnosis of diabetes mellitus type 1?

The behavior that best indicates effective coping with a diagnosis of diabetes mellitus type 1 is beginning to exercise three times a week. Regular physical activity is essential for managing diabetes, as it helps to control blood sugar levels, improves overall health, and can enhance emotional well-being. By committing to an exercise routine, the client is actively taking steps to manage their condition, which demonstrates an understanding of the importance of lifestyle changes in diabetes management.

The other behaviors listed indicate challenges in coping. Neglecting diet shows a lack of attention to critical management strategies for diabetes, while expressing hopelessness about the future suggests emotional distress and difficulty in adapting to the diagnosis. Withdrawing from family can indicate isolation and a lack of support, which are not conducive to effective coping. Therefore, engaging in regular exercise is a proactive and positive strategy for managing diabetes and reflects adaptation to the condition.