If you're signed up for the 2023 Boston Marathon, you may qualify to participate in a study of step timing relative to your heart's pump cycle and its potential relationship to your heart health and race performance.

Sign up below to begin the enrollment process,
or simply to gain more information about the study. 

You can also learn more about the study here.

Subjects who complete the study will earn a complimentary Counterpace step timing guidance system.