I pretty well understand how cycling can have different HR zones than running. One sport is more heavily weight-bearing than the other as well as other variations. Thus cycling tends to be, for me, about 10bpm lower per zone across the board.
But what about uphill treadmill walking? I picked this cross training activity up out of Matt’s books and enjoy it as an alternative to running that “crosses over” very well.
Should the HR zones align with running zones in this case? if not, do they trend higher or lower?