Final answer:
Regular exercise facilitates the uptake of glucose in skeletal muscles without the need for insulin, beneficial for both type 1 and type 2 diabetes patients; however, type 1 diabetes patients will still need insulin therapy.
Step-by-step explanation:
Regular exercise promotes insulin-independent uptake of glucose in skeletal muscles, which can help lower blood glucose levels without the need for insulin. This is particularly beneficial for patients with type 2 diabetes, since their condition primarily involves insulin resistance. Type 1 diabetes, on the other hand, is characterized by a lack of insulin production. While exercise can help with blood sugar control in type 1 diabetes, these patients always require insulin therapy. Therefore, regular exercise would most likely reduce blood glucose levels in patients with both type 1 and type 2 diabetes, making the correct answer 3) both type I and type II.