Abstract: A device includes a cardiac detecting component, a parameter detecting component, an interface component and a fatigue determining component. The cardiac detecting component detects a cardiac parameter of the user at a first time. The parameter detecting component detects a second parameter at a second time. The interface component receives a fatigue input from the user. The fatigue determining component generates a first fatigue indicator of the user based on the detected cardiac parameter at the first time, the detected second parameter at the second time and the fatigue input.

Abstract: A device has a body having a processing component and an orientation detecting component, and a cover disposed on the body. The processing component can operate in an inactive mode and can operate in an active mode, wherein the inactive mode expends less power than the active mode. The orientation detecting component can detect a first orientation and can generate an orientation signal based on the detected first orientation. The processing component can operate in one of the inactive mode or the active mode based on the orientation signal.

Abstract: A device for use with a wireless transceiver that is operable to transmit a data file. The device includes a communication component, a processing component, a parameter detecting component and a controlling component. The communication component wirelessly communicates with the transceiver. The processing component operates in a first manner. The parameter detecting component detects a first parameter and generates a parameter signal based on the detected first parameter. The controlling component generates a wake-up signal based on the parameter signal. The communication component can further receive the data file based on the wake-up signal. The processing component can further operate in a second manner based on the data file.