I had someone in the medical field tell me that 25-30 minutes of vigorous exercise would be equivalent to a medical prescription for high blood pressure. And while the Bible does say that bodily exercise does profit, it says that it only profits a little.

Let's read what it says,
Think about this: Bodily exercise will profit you only for a while (temporarily in this life). But godliness will not only profit you in this life, but also in the life hereafter. What a statement!

So what is godliness? Godliness or godly in the Old Testament is a word that is often rendered "saints." It indicated people who were recipients of God's grace and who showed in their lives the impact of that grace (1 Samuel 2:9; 2 Chronicles 6:41; Psalm 4:3; Proverbs 2:8).

In the New Testament, "godliness" could be defined as godlikeness, God-fearing, holy, right conduct in regard to God, a lover of God, to be devoted to God — doing that which is well-pleasing to Him.

Godliness or a godly person is one who has restructured their life around Jesus and is living their life as a disciple of Jesus, worshiping the Lord and doing good works (1 Timothy 2:10; Ephesians 2:10).

The medical profession is trained to treat symptoms of the body, but who is trained to relieve the symptoms of man's soul? Only Jesus is that great physician! Until man's soul, that is filled with sin, calls on the name of the Lord (Romans 10:13), there can be no lasting healing of the body. Man is comprised of a spirit, soul and body (1 Thessalonians 5:23). Until there is wholeness in all our being, there can be no lasting healing of the body. Sin has dealt a blow to our wholeness, but we have a Savior.

Godliness has promise in this life and in the life to come (1 Timothy 4:8). For in godliness you are putting on the armor of God (Ephesians 6:10‑18). Don't get me wrong, the affects of sin is still working in this fallen world, and will be until the coming of the Lord. But we can draw a miracle from the age to come and bring it into this fallen age. These are signs that Jesus said would follow his believers (Mark 16:15‑20).