19 Don’t you know that your body is a temple of the Holy Spirit who is in you, whom you have from God? You are not your own, 20 for you were bought at a price. So glorify God with your body.[a] (1 Corinthians 6:19-20 CSB)
Working to make ourselves better is a mental, spiritual and physical exercise. We must take time to properly exercise all three of these God given aspects. To neglect one is to compromise the whole.