Abstract: Systems and methods for smoothing out visual effects of Light Emitting Diodes (LEDs). An example circuit includes one or more LEDs, a hysteretic controller circuit, and a linearization circuit. The hysteretic controller circuit supplies current to the LEDs when a Pulse Width Modulation (PWM) signal is in a first state and the linearization circuit drives the current supplied by the hysteretic controller circuit to an off state when the PWM signal transitions to a second state.

Abstract: In one aspect, the invention provides a system for determining lower body strength of a subject. In one embodiment, the system includes an electronic device having a plurality of sensors distributed in a predetermined array and a frame coupled to the electronic device and configured to support the device to allow the subject to activate one sensor of the plurality of sensors.

Abstract: Embodiments of a performance tracking system and method are disclosed. One method embodiment, among others, includes receiving standardized physical performance test data over a network from a test site, the standardized physical performance test data corresponding to physical performance for a plurality of individuals, and processing the standardized physical performance test data to provide standardized data of physical performance among the plurality of individuals.