How to Improve Your Aerobic Threshold

The biggest stimulus to aerobic adaptation is the volume of training that a person does, which was why you were putting in all those huge miles on your bike. Yeah. But when we wrote this book and people started coming to us, asking for coaching and was getting, many of them without a particularly solid endurance training background. And we would discover that these people were massively aerobically deficient. These people would be producing high levels of lactate. So it had gone up by 30 beats and his running pace had dropped from that eight and a half minute mile down to a 615. A massive improvement without doing one interval.