Now, if distance isn't your style heres a fantastic alternative that, if anything, will work you harder then the average 2 mile run. It's a workout I stumbled upon while browsing the Internet, and excitingly attempted instead of my nightly run. It's called the Guerrilla workout, and believe me, its hard as balls. For those who want to go right to the source just open the link below in your Internet browser. For those that want to hear the workout, and my experience with it, please continue reading. The workout consists of 3 parts as usual, warm up, exercize, and cool down. The warm up and cool down are both a 4 minute, moderate paced jog. The exercise is a on off 4 minute sprint. First sprint all out, remember the key to fast sprinting is stride length and stride intervals, for 20 seconds follow by a 10 second rest.Do this so that you sprint 8 times, cool down and stretch. This workout is so difficult that I had to bump it up to a 20 second rest for my first night, since the 10 second rest was getting close to puke range. This workout is best done mixed in with your weight routine, making sure not to workout your legs 2 days in a row to provide ample rest for those muscles.
(EDIT: Sitting here now, about 20 minutes after completing my workout, my head is still pounding. Its a good feeling knowing the workout was a good one. Just remember! Plenty of water of protien as well as good sleeping habits are the keys to healthy muscles.)