Just as with all clients, those post bariatric surgery will need initial clearance from their surgeon (and if possible, their primary care physician and if applicable, physical therapist). I have only worked with one bariatric surgery client. They were referred to me by their surgeon. The surgeon gave me initial restrictions that went into the program design. I had the program design approved by the surgeon. The client went in for regular check ups and I would send along progressions/regressions for the surgeon to clear. All went well, but there were a few periods of time when the client was restricted to very minimal activity due to minor complications. As I am very conservative in the initial phase of all client programs, the exercises were not an issue. Within a year the client was doing very well on all aspects of wellness.
But every client is an individual case and needs to be treated as such. Although I start all clients out with foundation movements and indicated assessments, each progresses/regresses according to their individual reaction to exercise and their needs.