This is a percentage value that provides further detail on a Focus. With Focus Duration characterizing the duration along the Power Duration curve being focused on, Specificity Rating characterizes how specific the strain accumulated matches the precise work allocation ratios. 100% specificity rating is Pure and means that all the strain accumulated was at the power on the Power Duration chart associated with the Focus Duration. 0% specificity rating is Polar and all the strain accumulated was either at Peak Power or below Threshold Power. Generally speaking, cycling often has specificity ratings that are in-between pure and polar. These are classified as Mixed.
- Pure = 100% – 67%
- Mixed = 67% – 33%
- Polar = 33% – 0%
Ultra-Short Race Pace Training (USRPT), for instance, is an example of training at a pure specificity rating. Training is done at intensities that match a given intensity only.
One way to conceptualize, Specificity Rating, especially if you plan on performing adhoc workouts:
- Pure – You spent a majority of your time at or near the Focus intensity.
- Polar – You spent a majority of your time at Endurance intensity with efforts above your Focus intensity.
- Mixed – You had a mix of Endurance, Focus intensity and efforts above and below it.
You can fine tune your riding/running on the fly in achieving the target Focus or choose your workout by using these concepts.