I agree with the statement, but I don’t think it is exercise specifically. It’s work. We’ve perverted the word work, generally speaking, to amount to sitting in front of a computer screen for 40 hours a week.
Genesis 2:15, and there are thousands of example in the Bible, details Man being placed in the Garden to work it. And then in 3:23, we were sent out of the Garden to work the land from which we were taken. And it was to be difficult.
Proverbs 18:9 says whoever is slack in his work is a brother to him who destroys.
Solomon, named the wisest of men, said in Ecclesiastes 3:22 that there was nothing than for man to rejoice in his work. He calls it his lot.
Colossians 3:23 commands we work heartily for the Lord.
2 Thessalonians 3:10 says if one doesn’t work, he shouldn’t eat.
We were made to work and it is a blessing. Exercise is a form of this.