Runner Deena Kastor's Treadmill Playlist

Elsa/Getty Images

Three-time Olympic marathoner Deena Kastor typically makes it through her hours-long training runs sans music -- except when she's forced to crank out miles on the treadmill, that is. The 42-year-old American record-holder in the marathon, who currently has her eyes on the masters' record, shared with espnW the songs that keep her motivated.

Related Content