Usian Bolt has won 9 gold medals in last 3 Olympics and he has run less than 2
minutes on the track. That’s economy of effort.
Usian Bolt run for less than 115 seconds in total in his 3 Olympics and made $119 million dollars! That’s more than $1 million for each second he ran!.
But for those 2 minutes he trained for 20 + years! That’s Investment.