I sure hope that this is NOT the standard! Keeping records should be a basic part of record-keeping for your training business. After all, we as trainers collect important health-related information such as fitness assessment results, health forms etc., and we spend time talking to our clients about their goals, and the importance of consistency of exercise etc. Keeping a file and records for each client should be a part of the package. It shows our clients that we are serious about our profession and the client’s health and progress.
If not keeping records is a common practice amongst trainers I would be surprised and dismayed.