'Exercise' in the Bible

Jehovah, my heart is not haughty, nor mine eyes lofty; Neither do I exercise myself in great matters, Or in things too wonderful for me.

But Jesus called them unto him, and said, Ye know that the rulers of the Gentiles lord it over them, and their great ones exercise authority over them.

And Jesus called them to him, and saith unto them, Ye know that they who are accounted to rule over the Gentiles lord it over them; and their great ones exercise authority over them.

Herein I also exercise myself to have a conscience void of offence toward God and men always.

but refuse profane and old wives fables. And exercise thyself unto godliness:

for bodily exercise is profitable for a little; but godliness is profitable for all things, having promise of the life which now is, and of that which is to come.