I've been running two miles for two months now. Yesterday I wan going to do it again, but my legs were to weak!:confused:

Makes sense your legs are tired, you should try running ONE mile a day for a while, but first let them rest for a day, if this isn't a regular thing you do then you body issn't used to it. Hope this helps stephan

Maybe lay off running for a little bit?
I'm 15 and I've been running for like... 5 years (not that that REALLY matters lol) but I run like 5 miles a day... you have to build UP to it...

OK, if you have been running two miles a day for two months you should be built up so that that distance is easy, could you please explain anottle more

Are you eating before you run? Maybe your potassium is low, trying eating a banana before your start up. Have you been sick recently. Now that the weather is getting warming are you drinking enough water? If you're a beginner runner, try running and switch to jogging and alternate throughout the run. Or don't run the distance your doing, 1/2 it or run every other day if your just starting this. But more info would be helpful in order to help you!