Comparison of the answers of maximal heart rate across prediction equation and across a maximal laboratory test
Abstract
The heart rate (HR) is widely used as intensity indicator of aerobic exercise, because possess a intimate relation of linearity with the percentage of maximal oxygen uptake (VO2max), so that 60 to 90% of HR max is the same as more or less about 40 to 80% of VO2max. But such relation of linearity was proposal by maximal laboratory test, and not by prediction equation, taking the age as base. The objective of present study is to compare the responses of the heart rate taken in maximal test conduced in laboratory with those taken by predictive equations in function of the age. Making this comparison twelve college student were investigated, physical education students in the age between 18 and 26 years old (medium 23.3 ± 1.3) physically active. There were programmed two protocols selected according to the physical condition of the valued, in such a way that the valued reaches would reach the exhausted in a time between 8 and 12 minutes. The protocol A was composite of a 2 minutes warming up by 6 km/h, after this the speed was increased each minute by 0.5 km/h starting with a initial speed of 8 km/h. The protocol B was initiated at the same way, but only in each stage of the process the speed was increased 0.5 km/h every 30 seconds. Comparing the answers of HR obtained in the laboratory, there were adopted two equations, namely: a)220 – age, due the his popularity; b) 205.8 – 0,685 x age, because possesses the minor standard deviation encountered in literature.
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