A personal trainer in Lancashire, in the U.K., said she will kick clients out of their plan with her if they don't stick to routine — she said there are no excuses when it comes to staying healthy.

As well as helping us to live longer, "strength training will help you to have a better quality of life," Lauren Hurst, whose oldest client is 96, told Business Insider.

Steven Jezyk, who has worked as a trainer for more than 18 years and lives in Los Angeles, admits that he has dated a client before, but he maintains that it wasn’t his intention at the start.

4 traits shared by fit and active older people, according to a personal trainer whose eldest client is 96 ...