The Rock Hurler
The quest is unlocked after completing Each Step Like Thunder.
"You come across a bawling Goron boy, upset that he can't lift large stones. Through tears, he says, "To pick up big rocks, I gotta have big MUSCLES!" You know of something that may help."
"With a little help, the boy could pick up large stones and hurl them, taking out monster after monster! Now he wants to do lots of strength training so that he can lift rocks without assistance."