Augmented reality headsets; Downloadable computer application software for mobile devices, namely, software for collecting, recording, processing, analyzing data of user's biomechanics; Wearable activity trackers; Wearable technological devices being smartwatches; Wearable technological devices being virtual reality headsets; Downloadable video game software; Playing devices for sound and image carriers; Recording devices for sound and image carriers; Recording and playing devices for sound a...