# Using PD Curve to Improve TSS Model?

**URL:** <https://www.trainerroad.com/forum/t/using-pd-curve-to-improve-tss-model/11827>\
**Category:** Training\
**Tags:** plan-modification\
**Created:** [February 15, 2019, 2:08pm UTC](https://www.trainerroad.com/forum/t/using-pd-curve-to-improve-tss-model/11827 "2019-02-15T14:08:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![themagicspanner](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/themagicspanner/32/129528_2.png) [@themagicspanner](https://www.trainerroad.com/forum/u/themagicspanner)\
**Post date:** [February 15, 2019, 2:13pm UTC](https://www.trainerroad.com/forum/t/using-pd-curve-to-improve-tss-model/11827/2 "2019-02-15T14:13:46Z")

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There is already a detailed discussion on the subject here:

[https://www.trainerroad.com/forumt/is-tss-of-sub-threshold-zones-levels-created-equal/](https://www.trainerroad.com/forumt/is-tss-of-sub-threshold-zones-levels-created-equal/)

Mike

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_[View the full topic](https://www.trainerroad.com/forum/t/using-pd-curve-to-improve-tss-model/11827)._