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  • (cur | prev) 17:36, 13 May 2023TatianaMerriam (talk | contribs). . (5,465 bytes) (+5,465). . (Created page with "How to Calculate your Maximum Heartbeat (MHR) and Training Zones The simplest and best-known method would be to use the formula 220 - how old you are. (For example, a 30-year-...")