By John Hand – The days of guessing are long gone. Caller ID tells us who is on the opposite end of the line, cameras on doorbells let us know who’s knocking and GPS reports where everyone is. The age of information also has revolutionized the basic workout. Fitness trackers can now flag users on many metrics from a workout session and report on a person’s general health. This boom started about a decade ago when wearable fitness trackers, such as Nike iPod and Fitbit surfaced. Since then, the market for fitness data has exploded, and companies like Apple, Whoop and Garmin all developing their own monitoring devices. By 2016, fitness tracking devices had exploded into a $7.58 billion business in the U.S. alone. By 2028, the U.S. market…