This is an excellent devotion about keeping the proper perspective of our fitness/physical accomplishments.
2 Corinthians 10:12-14
New International Version 1984 (NIV1984)
12 We do not dare to classify or compare ourselves with some who commend themselves. When they measure themselves by themselves and compare themselves with themselves, they are not wise. 13 We, however, will not boast beyond proper limits, but will confine our boasting to the field God has assigned to us, a field that reaches even to you. 14 We are not going too far in our boasting, as would be the case if we had not come to you, for we did get as far as you with the gospel of Christ.