Founded by former Boston College track and field captains, this “all things running” store offers personalized fittings with gait analysis to prepare runners to safely sprint through the streets. Not a fan of the great outdoors? The Cambridge location’s Heartbreak Studio has students sweating on treadmills in organized classes. Individual cardio coaching from instructors is also available, and runners can opt to join the Heartbreakers, a local running group for all ability levels that receives weekly motivation from co-founder Dan Fitzgerald.