There are a couple reasons why Vi may not be as talkative as you're used to during a run.
1. She could be working hard to learn about who you are and how you run during the initial calibration period of about 2 hours. Once you have passed this calibration period, Vi will be significantly more chatty, providing real-time insights.
2. Your "Chattiness Level" has been lowered. This setting gives you control over how much or how little Vi talks to you during your run. To check this setting, click on your profile in the app home screen, navigate to your settings, and select "Chattiness Level". There are three levels to choose from. The most chatty is called "Lead the Way" followed by a medium level called "A Little Less", and the lowest chattiness level is called "Short and Sweet." You can change this setting at any time.