Dimity and Sarah are joined by Summer Sanders, winner of four Olympic medals in swimming who has been a runner for two decades. A mom of two, Summer shares how she shifted from being a serious athlete to a social one (even though Dim and Sarah think her 3-hours-and-change marathons are plenty serious!). From there, Summer dispenses more excellent running and training advice than pretty much the entire AMR book trilogy —everything from the importance of occasionally skipping a workout to holding back in the first mile of a race.

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