what is lifestyle?

if i change my diet, will that change my lifestyle?
what about if i start a new work-out routine?

i believe that changing your lifestyle is a lot harder to change than it appears. no one can change their lifestyle with a few small steps. but this is given that i comprehend exactly what is meant by the term 'lifestyle.' in my simple understanding, lifestyle describes the way in which you live your life. if that's correct, then there are only a few ways - and yes feel free to call me pessimistic and cynical - one can truly affect their lifestyle: coming into large quantities of money, moving to another country, a significant change in your healthy and physiology (which could be brought about by diet, exercise, etc.) and yep, that's about it.

going to college down south, moving to a trendy neighborhood in new york city, getting a boyfriend, making new friends, taking ballet lessons, reading philosophy, getting a job, eating sushi, drinking sparkling water, shopping at sigerson morrison...makes no difference for me...