Am I Not Being Reasonable?

I have recently hired a personal trainer. This trainer helps me workout, exercise, etc. However I have come to realize that the more I am with this trainer the act of doing these physical exercises triggers me immensely. On the other hand I love the trainer themselves. Do I tell this trainer about my PTSD briefly and how it relates to the physical act of working out in the hopes we can come up with a plan together or just hide it and avoid telling this trainer? I trust this trainer of course... Working With A Personal Trainer Having Ptsd
https://www.myptsd.com/c/threads/am-i-not-being-reasonable.66831/