These depend on what you've produced in Walkr over the last 7 days:
Banker : Has produced the most coins in the last 7 days
Athlete : Has produced the most energy in the last 7 days
Cook : Has produced the msot food in the last 7 days
Banker : Has produced the most coins in the last 7 days
Athlete : Has produced the most energy in the last 7 days
Cook : Has produced the msot food in the last 7 days