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Wearable digital electronic devices comprised primarily of software for sending and receiving data and information from smart phones, tablets and portable computers; wearable electronic devices comprised of wearable computers featuring wireless communications for data transmission; portable and wearable electronic wristbands for tracking and measuring heart rate, calories burned, stride rate, duration, distance and speed of physical activity during exercise; wireless capabilities comprised of wearable computers for measuring, tracking, analyzing, displaying, uploading and transmitting data related to physical activity, fitness and general health; computer software for providing users with information and analysis regarding their physical activity, fitness and general health; wearable digital electronic devices comprised of wearable computers incorporating wireless communication technology for measuring, tracking, analyzing, displaying, uploading and transmitting data related to physical activity, fitness and general health; wearable digital electronic devices comprised primarily of watchbands featuring computer firmware and software for sending and receiving data and information from smart phones, tablet computers and portable computers