Why do my legs hurt while running?

Hi. I recently got a treadmill. I'm wondering if it's possible to run 'wrong' on a treadmill. For example, I just did an hour on there, I tend to go back and forth between difficult speeds and then slightly lower speeds, for recovery. I get really hot...

I run 6.0mph for 1 mile take 0.2mi break and then run again for 1 mile at the same speed on a treadmill. After I run, my legs hurt a lot, I like running, but I can't enjoy it ...show more

i do this thing at school called 14 min. run-walk and you run for 2 min and walk for one. we dot it every monday without stretching and this is the millionth time ive done it. I don't know why but my legs are really sore and i can barely walk, and this...

I play soccer and lately my legs have begun to hurt while I run and the pain just wont let me run as fast as I can. I stretch out really good all the time. The pain is in the front ...show more

Everytime I run, whether it's during the workout or after, my legs start to hurt..i think around the achilles area..i'm assuming it's soreness im not sure, but I took one ...show more

i started running a few weeks ago. (short distances, run/walk, and rest days) breathing was hard but no unusual discomfort. Now, my calves HURT! when i run, 5 mins in it's a ...show more

I'm 15, 5' 6" and about 110 pounds. I do junior varsity track. If I run for even a short distance like 400m or sprint 100m, my calves and shins hurt a lot. When I run ...show more

so i've recently begun running about a week or so ago, running about 2.75 miles in 30 minutes, almost every day. Since beginning last wednesday, i've ran 8 times for a full 30 minutes every time. Today was the first time that i experienced any pain while...

I've just recently started running. I get up at 5:30 and run for 10-15 minutes. I'm hoping to run longer times, and improve by running more often. Its the third day i've been running in the mornings now, and ive noticed that my shins hurt .. and legs...