"If it is to be, it is up to me"

To me this quote means if something is going to get done or expected to happen, it is up to the individual to make it happen.  You can want something for a person so bad, but if they aren't interested or dedicated in making something happen, it actually never will happen.  In regards to personal fitness, this quote simply states that if one is going to meet or goal they have set for themselves, it is soley up to them to meet it.  There is no room for excuses.  I feel that the idea of letting another influence your work effort plays a part in this quote as well.  It isn't about what another person does or wants to do, it is all up to you.  One should work towards meeting their personal goals because they want to and let go of all the excuses that may lead them astray.  If deep down you want something, it is up to you to meet your goals.