Abstract: In a health exercise assist system, a portable music playback apparatus acquires a preset exercise plan, a history of exercise information, and a music playback history and stores them. An information processing apparatus produces a service request including at least one of the preset exercise plan, the history of exercise information, and the music playback history acquired from the portable music playback apparatus, and transmits it to a service information providing apparatus. In accordance with the service request received from the information processing apparatus, the service information providing apparatus produces service information and returns the produced service information to the information processing apparatus. The information processing apparatus provides the received service information to a user of the audio playback apparatus.

Abstract: An electrochemical device comprises a pair of electrodes having electrode layers formed on strip-like collectors except on their strip-like portions along a longitudinal side of the strip-like collectors; strip-like separators insulating these; two collector plates connected to the strip-like portions; a case accommodating these; a lid for sealing the case; a pair of terminals connected to the collector plates and being connectable to an outside of the case. The pair of terminals is respectively connected to the lid and the case, and the pair of electrodes are wound interposing the separators therebetween, and the strip-like portions are located on both end surfaces. The electrochemical device has high volume density and low internal resistance and it can be manufactured in short time.