your selected exercise should be one that you can do consistently and regularly, so that it becomes a normal part of your life.
For health and assistance in blood sugar management the minimum recommendation would typically be 30 - 60 minutes of moderate exercise daily.
This could be split into 2 or more sessions. Ie. 20 minutes of brisk walking after each meal, or 30 minutes activity morning and night, or 1 session.
You can also increase your regular activity. ie. walking up stairs instead of elevator. Walking while shopping (park farther away than usual), housework, etc.
Hope this helps.
We have a lot of great information on exercising safely with diabetes, how much exercise to do, and what kinds help you on MedHelp.org and in the Sugar Sense app. You can find this in the app by clicking the menu bar in the upper left and selecting Health Guide, then navigating to the Move More section. Here are just a few that might help you!