A wearable system and methods for measuring physiological data from a device worn about a body part of a user is provided comprising a base module and sensor module. The base module comprises a display and a base computing unit. The sensor module is spatially positioned relative to the base module and over a portion of the body part for measuring one or more physiological characteristics. The base module is adjustably positioned by the user relative to the sensor module such that the sensor module maintains its positioning over the body part for sufficient contact with the body part for accurate measurements of physiological data regardless of the anthropometric size of the body part.
