Gyms and trainers are positive resources at any age. Activity fosters health. Keep active and live longer. Who can argue with these ideas?
Older people need to watch out for young personal trainers who bring a boot camp attitude to sessions. Personal trainers are not physical therapists who must earn a doctor of physical therapy degree and pass a state licensure exam. I have had several friends who suffered injuries during sessions with overzealous trainers.
It is good to discuss goals and methods before beginning sessions with a trainer. Stay in control of the process. It is your health that is at stake!!