Hi Dave-My dizziness came on during the second or third week and last for a week or two. Now it is completely gone. One day was scary-I was in my classroom, with my students and felt like I was going to pass out. I was sitting down but the room started spinning. I was able to call the school nurse and she had me lay down on the floor with my feet up on a chair, then sit up and drink water. It went away and I didn't pass out luckily. So glad that is gone! I am going to start at 24 Hour Fitness next week too!