The average of three days should be used to obtain a representative value (sum three-day accounts, and divide the total by three). Power Boost XI A person w Power Boost XI h an average f Power Boost XI ness level should use intens Power Boost XI y levels of 60 to 70 percent of the heart rate reserve. Heart Rate of Training Age Heart rate at rest Intens Power Boost XI y Borrar Calculate Maximum heart rate Reserve heart rate Heart rate training Body-building? 

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