fitness – n. the quality or state of being fit
tracker – n. a device that is aware of a fact, progression or condition
counseling – n. advice and support that is given to people to help them deal with problems, make important decisions, etc.
calorie – n. a unit of heat used to indicate the amount of energy that foods will produce in the human body
composition – n. the way in which something is put together or arranged : the combination of parts or elements that make up something
journal – n. a magazine that reports on things of special interest to a particular group of people