KINESIOL 2CC3 Study Guide - Final Guide: Fick'S Laws Of Diffusion, Mean Arterial Pressure, Vasoconstriction
15 Sep 2016
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Variability in max hr: not everyone = 220-age. 220-age is just an estimate; variability +/- 1 sd = 68% of population. 1 sd = 11-12 bpm huge variation. If people are on low or high end you could be pushing them way too hard. High intensity training > 85% vo2max: always individual variability to max hr, makes it easier prescription for public by using 220-age. 220-ageis not ideal for individualized exercise, just used for general or group prescription. Assumptions: linear relation between hr and workload if not linear, causes extrapolation problems, hrmax = 220-age roughly predicts true max hr. Procedure: measure hr at 2submax workloads, extrapolate line to predict hrmax, determine predicted vo2max. Advantages: easier (don"t have to go to true vo2max, less equipment trvelling is easier to test people, ease, comfort, time-efficient. Using hr to predict work intensity: karvonen formula . Heart rate reserve is the difference between maximal and resting hr.
