The living force is always dynamic; therefore he cannot stop discharging duties. Real duty begins in Krishna Consciousness.
In India the practice was hand grind daily. That’s exercise their body fit & beautiful. In the morning they chant Hare Krishna & grind. Whatever they require for the day, they grind fresh. Churning milk, grinding the wheat, this is their household activity. full engagement. no time for gossiping.
When we see beautiful thing, what is it? It is just some light entering into our eyes and it is making us mad. Some frequency entering our ear & we get mad. Something scraping our tongue which is just a lump of flesh wiggling around. But when something touches its surface we go mad. This is material enjoyment & we take it seriously.
One can purify the mind by the chanting process, just as one can purify gold by putting it in a fire and fanning it with a bellows.
Srimad Bhagavatam 3.28.10,