Legs
usually riding on Zwift or up steep hills...
- Location
- Staffordshire
Four months of exclusively aerobic training improved his pace at that HR by over a minute (so 8:15 to 7:15).
But who knows what he was doing in the water and on the bike during that 4 month period?
Then, after a year of doing mostly aerobic training, his pace at 155bpm was 5:20
It is clear from the text that he was including interval sessions after that four months of exclusively aerobic training.
You will recall from the linked article that the intervals it describes are
"...around15-30 minutes of hard high heart rate effort total. This means that if you are going to the track to do intervals do about 5k worth of speed during the entire workout. Less than that and the physiological effect is not as great. More than that and you just can't maintain a high enough effort during the workout to maximize our benefit. You want to push your interval making each one a higher level of intensity and effort than the previous one. If you reach a point where you cannot maintain your form any longer, back off the effort or even call it a day. That is all your body has to give."
Who knows how many such sessions he was doing, or specifically how they were structured?
Even allowing for some element of sales spin, I don't seriously doubt the veracity of the claim.
I agree that everyone's experience will not match his.
Maybe I’m cynical, but many athletes, particularly around that era, had revolutionary ‘training plans’ from infamous ‘coaches’ that turned out to be something else altogether!