Below are general recommendations from the ADA on physical activity in people with diabetes and prediabetes.

Findings suggest that flexibility and balance training may result in various improvements in people with diabetes as well as a reduction in the risk for falls and improvement in joint mobility in older age. For people with type 2 diabetes, studies have linked Yoga with improved glycemic control, lipid profile, and body fat. There is some evidence that tai chi can improve glycemic control and neuropathic symptoms in adults with diabetes.

A minimum of 150 minutes of moderate- to vigorous-intensity exercise per week, spread over at least 3 days with no more than 2 days between sessions, is recommended for most adults with type 1 diabetes and type 2 diabetes. The guidelines also recommend 2 to 3 sessions of resistance training on nonconsecutive days, as well as 2 to 3 sessions of flexibility and balance training, such as Yoga or tai chi, for older adults with diabetes.

http://www.thecardiologyadvisor.com/metabolic/physical-activity-guidelines-diabetes/article/579001/