Correct me if I am wrong, but the correct formula for calculating training HR is:
220-your age x 80% = training hr. So in my case:
220 - 43 = 177 x 80% = 141. My training hr should be 141. In that case, if I am coming back from my rides with an average hr of 150, theoretically I should be getting the maximum aerobic workout from that ride. Correct?