The most important thing to remember is that being active is a lifestyle and as such it takes time for the habit to become a routine part of your life. Also know that it takes three months of consistently performing a new behavior for it to become routine, and as far as physical fitness goes that is a long term process depending of where you start from. I'm 61 y.o. and my philosophy is to break a sweat everyday, no matter how I do it; walking the dogs, exercising, taking a sauna, whatever it takes.