Usain Bolt won 9 gold medals in the last 3 Olympics and he has run less than 2 minutes on the track. That’s economy of effort.
Usain Bolt ran for less than 115 Seconds in total in his 3 Olympics career and made 119 million dollars.
That’s more than $1 million each second he ran!
That’s a new unit of sped for the “run” for money.
$1million/sec. But for those 2 minutes, he trained for 15+ years!