like when i read about running it makes me want to learn to do it even more

The act of running generates 3 to 5 times your body weight in impact force per foot-strike. Your bones have to get harder, your muscles need to adapt and get stronger, and you can’t rush that process.
— 

 Matt Forsman, a San Francisco Bay area-based USATF-certified running coach

that first part is so crazy to me. runners are fucking superheroes