Feasibility and Usability of a Chest-Strap Ambulatory ECG Monitor in Active Individuals in Comparison With a Traditional Ambulatory ECG Patch Monitor (MoMe ARC)

Inclusion Criteria: * Adult participants (\>22 years; Frontier X is approved for use in this age group) who participate in \>4 days a week of \>150 minutes total per week of moderate to high intensity exercise who were prescribed a ambulatory ECG monitor for clinical purposes for 24 hours or more. * Patients must agree to wear the Frontier X monitor for the prescribed duration and use the Frontier X Plus application Exclusion Criteria: * Current use of Implanted Cardiac Devices * Pregnancy * Known allergies to any of the materials listed in the "List of Patient-Contacting Materials" * Presence of skin injuries or broken skin in the area where the chest strap is worn * Inability to use a compatible mobile device required for the operation of the study device * Any cognitive or physical limitations that, in the opinion of the investigator, limits the participant's ability to fully follow study procedures * Medical restrictions on exercise for safety including cardiac, orthopedic or other relevant past medical history