Maximum Heart Rate cards 10 pack (4″x6″) - Heart Zones

Maximum Heart Rate cards 10 Pack (4"x6") Use these small sized cards for each of your different sport-specific maximum heart rate activities.

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Maximum Heart Rate cards 10 pack (4″x6″) - Heart Zones

Heart Rate Zones Training Guide

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Maximum Heart Rate cards 10 pack (4″x6″) - Heart Zones

Max Heart Rate - Heart Zones