Target Training Heart Rate Problem 2
Tutorial to help us answer problem 2.
First, we find the maximum heart rate of this 60 year old man as,
HRmax = 220 - A = 220 - 60 = 160.
We are given the man's target heart rate when he is training at 55%,
HRtarg = p · HRrsv + HRrest,
124 = 0.55 · HRrsv + HRrest.
Now we have an equation with two unknowns. To determine the resting hearT rate (HRrest) we can find the unknown HRrsv in terms of HRrest,
HRrsv = HRmax - HRrest= 160 - HRrest.
Substituting this expression for HRrsv into the equation for HRtarg gives,
124 = 0.55 · HRrsv + HRrest,
124 = 0.55 [160 − HRrest] + HRrest,
124 = 88 − 0.55 HRrest + HRrest,
124 = 88 + 0.45 HRrest.
Solving for HRrest gives,
0.45 HRrest = 124 − 88 = 36,
