Why W'balance is used in intervals below CP?

This is the final episode of a short series of 4 videos on the CTS_TrainRight youtube channel with Tim Cusick. Published between 3 Dec 2025 and 24 Dec 2025, it is a good series that covers what to include in a training plan and why.

Here is my very short summary of the whole series

“Progress your training plan from aerobic / base work, to FTP work, to VO2 work, to anaerobic work. There is a benefit to all cyclists from touching all of those areas in their training. The biggest benefit comes from the aerobic / base work.”

This episode covers the W’Bal topic: anaerobic capacity and how to train it.

TLDR - for a couple of weeks or so, do sessions with ~1 minute all out intervals. 6x - 10x with ~8mins rest between intervals.

An interesting part of the video is about recovery from above FTP efforts - recharging the anaerobic capacity (between intervals and generally).

Cusick proposes that a better trained / developed aerobic capacity improves the rate of recovery from anaerobic work. Moreover, in time crunched cyclists, who ‘don’t have the time’ to develop their aerobic capacity, that shows up when they come to do this anaerobic training.

The video is cued up to the start of that section (which is about 3 minutes long)