I’ve never worked so hard that I vomited (despite the fact it was praise worthy in high school track and field) nor have any of my clients.
If you are well-acquainted with who you’re training, you won’t push them to that point since there is no benefit. So, to answer your question: I would feel horrible if I got somebody to that point; that said, the client has to bear some responsibility in letting you know how he/she is feeling…
The clients that come to me want to enhance their life, and how they travel through it, through movement that is energizing, challenging, dynamic, and thoughtful. Vomiting has no place in that scenario.
I had a few clients throw up…one female and one male. My male client simply didnt eat properly and began our session with low blood sugar early in the A.M. and he didn’t disclose this to me.
He got dizzy, all exercising stopped at that point..walked with him to the locker room with an ice pack and towel ready if needed..then sat him down. I made available to him some orange juice and sat with him until he felt fine.
My female client simply drank too much water during her session and threw up afterwards…primarily the excess water.
In both cases our sessions were’nt any harder than normal…just unseen circumsatances.
I agree with Karin in that I’ve been training clients for over 18-years, and I’ve NEVER had a client vomit during or after training with me. I work with a wide-variety of clients, including young athletes in outdoor heat environments. I don’t expect vomiting when someone is training with me. I would definitely feel badly, but more importantly I would have a conversation with my client (which I ALWAYS do so perhaps it’s why I’ve not had this problem) about the importance of their being candid with me about 1. how they are feeling physically (are you sick) before training, and 2. checking in with me during the training as to how they are feeling.
I hope that this helps.