Why is exercise prescribed for a person with type 2 diabetes?

The rationale behind prescribing exercise for a person with type 2 diabetes lies in the function of muscle contractions during physical activity. When muscles contract, they utilize glucose from the bloodstream for energy, which consequently helps to lower blood glucose levels. This action mimics the effects of insulin in the body, often referred to as an "insulin-like effect."

This effect is beneficial for individuals with type 2 diabetes, as their bodies either do not produce enough insulin or do not use insulin effectively. By engaging in regular exercise, individuals can enhance their glucose uptake by muscle cells, which assists in overall blood glucose control and improves insulin sensitivity over time.

In contrast, other choices suggest incorrect interpretations: one incorrectly states that muscle contraction decreases insulin sensitivity, while another claims muscle contractions do not affect insulin sensitivity at all. Additionally, an option misrepresents that muscle contractions elevate insulin levels, which is not the direct outcome of exercise; instead, the emphasis is on improving glucose utilization and sensitivity. Therefore, recognizing the insulin-like effect of muscle contractions accurately explains why exercise is essential in managing type 2 diabetes.