JULY 2018 RUNNERâS WORLD 19PERSONALBESTTRAINING 20FUEL 28TREADMILLPOWERA DIEHARD OUTDOORRUNNER FINDSTHAT NEW APPS ANDMACHINES MAKEPOUNDING THESLABS MORE FUN ANDEFFECTIVE (FINALLY).BY MATT GROSS``````PHOTOGRAPH BY GALLO IMAGES/GETTY IMAGES
jacob rumans
(Jacob Rumans)
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