Meredith Dietz

Meredith Dietz Senior Staff Writer

Experience

Meredith is a marathon runner and stand-up comedian. As Lifehacker’s Senior Staff Writer, she covers personal fitness tech, home gym equipment, and more.

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May 19, 2026

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Credit: Meredith Dietz

Table of Contents

As the average running watch gets increasingly high-tech, there’s a new normal for pre-race rituals: Staring at your watch the week before a big event, hoping the algorithm has good news for you.

Both Garmin and Strava offer race time predictions, but how accurate are they, really? I put each platform to the test during the Brooklyn Half Marathon on May 16, 2026.…