From my own experience, I know how easy it is to become so caught up in your physical appearance that you neglect what truly matters more than anything-your relationship with Christ.
Having a fit and healthy body is important while here on Earth, but it won't matter in Heaven. We most definitely should take care of our bodies, but it should not become what your life revolves around.
What are you doing each day to strengthen your relationship with Christ? Are you more focused on pursuing the perfect body than pursuing God?
"While bodily training is of some value, godliness is of value in every way, as it holds promise for the present life and also the life to come." -
1 Timothy 4:8