Picollo has been the first that we know of that uses meditation to get stronger... when meditating it takes a day, or more(depending on your choice). You cannot do anything else in the day when meditating.
after a day
Ki Manipulation +10
intelligence +10
after 2 days
Ki manipulation +22
intelligence +22
after 3 days
Ki manipulation +35
intelligence +35
after 4 days
Ki manipulation +48
intelligence +48
after 5 days
Ki manipulation +65
intelligence +65
after 6 days
Ki manipulation +77
intelligence +77
after 7 days
Ki manipulation +100
intelligence +100
"brawns will fill up your head while brains will make the opponent dead"