The world of wearable sensor networks is constantly improving as the potential benefits these systems offer become more apparent. Today, there are several wearable sensor networks being developed for health and wellness purposes as well as entertainment purposes. This paper will take a closer look at the different available sensors that are being used to collect data, as well as the systems that use them. Sensors for fall protection for the elderly, long-term health monitoring, human gait analysis, interactive media, and gaming and animation are studied with respect to the state of the art in wearable sensor technologies. This research hopes to further advance the technology for the wearable sensor networks and wearable health monitoring systems in these fields.