Personal electronic devices used to track fitness goals and statistics; wearable activity trackers comprised of sensors, for use by swimmers to track minimum, maximum and average velocity of swim stroke, acceleration and deceleration patterns during swim stroke, stroke rates, arm symmetry, and timing and length of swim strokes; portable digital electronic devices for recording, organizing, transmitting, manipulating, reviewing, and receiving text, data, and digital files; wearable electronic devices, namely, waistbands that are comprised of software that communicates data to personal digital assistants, smart phones, and personal computers through Internet websites and other computer and electronic communication networks; computer peripheral devices; computers; sensors for scientific use to be worn by a human to gather human biometric data; computer application software for smartphones and mobile devices in the fields of fitness and exercise featuring recommendations based on swimming performance, information on swimming, digitized techniques of world-class swimmers, analysis of user swimming technique, swimming exercises, video swimming instruction, assessments of swim sessions; mobile application software for creating personalized fitness training programs and exercises for swimming