Usain Bolt has won 9 gold medals  in last 3 Olympics and he has run less than 2 mins on the track. That’s economy of effort.

Bolt ran for less than 115 secs 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 mins he trained for 20+ years ! That’s investment!!!!