Heart rate training first hit the headlines in 1976, when the Finnish cross country ski team swept the board at the Winter Olympics after training this way. From then on it became popular among elite athletes, but cumbersome chest straps and baffling information made the uptake slow among the general public.
However, the conversation is certainly in full swing now thanks to operators like Orangetheory Fitness, which has put heart rate training at the centre of its offering. With growing awareness and fast evolving technology, where is heart rate training heading?