# Continuation of equilibration MD runs with the full precision trajectory (cpt)

**URL:** <https://gromacs.bioexcel.eu/t/continuation-of-equilibration-md-runs-with-the-full-precision-trajectory-cpt/9652>\
**Category:** User discussions\
**Tags:** mdrun\
**Created:** [July 15, 2024, 6:17pm UTC](https://gromacs.bioexcel.eu/t/continuation-of-equilibration-md-runs-with-the-full-precision-trajectory-cpt/9652 "2024-07-15T18:17:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dulaj](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/dulaj/32/3408_2.png) [@Dulaj](https://gromacs.bioexcel.eu/u/Dulaj)\
**Post date:** [July 15, 2024, 6:17pm UTC](https://gromacs.bioexcel.eu/t/continuation-of-equilibration-md-runs-with-the-full-precision-trajectory-cpt/9652/1 "2024-07-15T18:17:24Z")

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GROMACS version: 2023.2  
GROMACS modification: Yes/No  
Here post your question

In the Gromacs membrane tutorial, the production run has been set to start with previous MD run velocities using `-t <previous_run>.cpt` at grompp. However, during equilibration steps, there is no such continuation and most times I haven’t seen continuations of velocities in equilibration steps. However, I feel that it would be better if the equilibrations with multiple nvt and npt steps are done with velocity continuations.

Can someone explain is it appropriate to do velocity continuations during multiple equilibration steps?