You know how your doctor will tell you just by walking for at least 30 minutes a day can change your health? She/He isn’t exaggerating. I’ve been walking for thirty minutes a day and I feel so much better on the inside. My blood pressure (which is sometimes high) is normal. I eventually want to do more than just walking, but as of right now, I’m okay with that. So try walking for 30 minutes a day (on your lunch, around the office, etc.) and if you can’t do 30, try 15.
Remember your doctor isn’t telling you all of this because it’s beneficial (health wise) to them.