HR Calculations

Focusing on Intensity, determining intensity level is usually based on either % of max HR or % of VO2 MAX

Ways to prescribe aerobic exercise intensity

• HR (Table 5.2)

  • %HR max

    • predicted HRmax = 208-(.7x age)

    • Target HR= (HRmax)(% intensity)

  • %HR reserve

    • Target HR = [(% intensity) (HRmax-HRrest)] + HRrest

• Perceived exertion

  • RPE

  • Talking

Ex Rx by RPE

• Use when:

  • clinical/medical conditions impair HR response to exercise

  • pregnancy

  • difficulty measuring HR

• Borg RPE (flawed, doesn’t account for age) table 5.2

  • 6-20 some do (1-10)

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