As an 82 year old man, I need continuing exercise if I am to live to 100! If I don't have a regular regimen, I will not have the incentive to exercise on my own, and if I did, it would not be as rigorous as with the trainer.  Mark has been my trainer for over seven years and recently I scheduled three sessions a week to stay as healthy as possible. All I can say, is to find someone who understands older adults, and let them help you stay physically functional!