For many, GPS watches are a remarkably useful training tool. But there are other runners, including world-class runners like Jacobs, who have a hard time understanding the fuss. “I like to focus more on the feel of everything and not worry too much about the time,” Jacobs said. Heather MacLean, an Olympic 1,500-meter runner, recalled a period of her life when she enjoyed the utility of a GPS watch. Later, as a first-year pro with Team New Balance Boston, MacLean tried to be consistent about wearing a GPS watch but was hampered by a couple of issues.

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Persons: Jacobs, ” Jacobs, Heather MacLean, MacLean Organizations: GPS, University of Massachusetts, Garmin, New Balance Boston