Romans 6:13 “Do not offer any part of yourself to sin as an instrument of wickedness, but rather offer yourselves to God as those who have been brought from death to life; and offer every part of yourself to him as an instrument of righteousness.”
As Christians, we are called to offer all of who we are to Christ so that we may be used as an instrument of righteousness. This involves giving up our fleshly desires and taking up our cross everyday. Working out and eating right are important in maintaining our health. We are a lot easier to use if we are healthy. Taking care of your body is not always fun or easy, but we are called to. Be the best you you can be and allow God to use you in ways you have never imagined.