Human legs can only run so fast: Here's why

So far, the fastest any human has run is about 27 1/2 mph, a speed reached (briefly) by sprinter Usain Bolt just after the midpoint of his world-record 100-meter dash in 2009.

Should adults have their bow leg condition corrected?

Extremely steampunk leg attachments could let humans run 46 miles per hour

How to achieve perfect running form

Would humans run faster if they ran with their legs and arms? - Quora

Heavy Legs When Running? Top 10 Reasons and How to Fix Them!

Do people with long legs run faster than people with shorter legs? - Quora

Long-distance running and evolution: Why humans can outrun horses but can't jump higher than cats.

What Muscles Does Running Work?

How Fast Is the World's Fastest Human?

Cuboid syndrome: What it is, treatment, and recovery

6 leg day mistakes you're definitely making

The Human Body Is Built for Distance - The New York Times

Venogram: Procedure Details & Recovery