To provide a physical condition interlocking control system capable of providing a cabin environment according to a physical condition of a user, while using a portable machine among a plurality of users.
This physical condition interlocking control system includes the portable machine integrated with, for example, a wristwatch and installed on the user, and a vehicle side apparatus installed in a vehicle and communicable with the portable machine. The portable machine discriminates and authenticates the attached user, and stores physical condition information on its detected user as physical condition information associated to the user, and outputs the information to the vehicle side apparatus. The vehicle side apparatus stores user information including the physical condition information on the user acquired from the portable machine, and estimates the physical condition of the user based on its user information, and the operation content of an operation part for performing operation for assisting the use of the vehicle by the user or providing amenity for the user is changed according to the content of the estimated physical condition.
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