If you cannot take any pain, make this clear. If you have any injuries that can impact our session, I need to be aware. Any issues with asthma/breathing, hip/leg/back/knee issues, mobility problems, heart issues or claustrophobia need to be mentioned. I have first aid training, however if anything is to happen within the session and it is outside of my limited capability to manage, I will call for an ambulance and need to give adequate information to them.