/mixed feelings on above posts.
I agree that elderly, rehabilitating, injured or deconditioned clients should never be pushed to vomiting. It’ll give them negative associations with the gym as well as not being conductive to their goals.
Athletes should be to a point where their workouts do not pose this threat.
Bodybuilders, powerlifters and strongmen may come to a point in their training where they work hard enough this could happen.
Usually there are a lot of factors to take into account. Sometimes they could simply be sick. Bad food. Etc. There is too much to take into account about a client simply throwing up.