How do streaks work?
As long as you do at least one session per working day, your streak will continue. By default working days are Monday through Friday but you can configure that in your account settings.
Note that you will not increase your streak if you don’t do a session on weekends. Although you won’t lose your streak, the streak will simply stay at the number it’s currently at. You can however increase your streak if you decide to do sessions on a weekend.