I love to run. It's my favorite form or terrestrial locomotion. 
i love to run early in the mornings!
Yes. It's so good for strong legs. There is a spring-mass mechanics that uses the kinetic energy to propel you forwards. How far do you run?
I try to get in 5 miles a week but sometimes it can be hard.
Yeah. I just jog, but I'm currently training for a marathon. People usually generically call it "running" but it can mean anything from jogging to sprinting.
Wow that is really cool! The only think I know is it gives you a good workout.
Yes definitely. I jogged for 25 km yesterday. People usually jog over long distances and is a great endurance aerobic exercise.
I have seen pictures of runners legs after 5Ks and it looks pretty crazy.
Haha crazy as in muscular? Running is great though, it's probably the worlds most accessible sport. You don't have to buy a lot of equipment.
No in the picture their veins are huge! You should look it up if your squeamish.