Running an 8-minute mile requires discipline and proper training. In addition to running, exercises like swimming, muscle-endurance training and cycling indirectly increase your running speed. Generally, running farther than you need to will help condition your body to handle the stresses of an 8-minute mile. If you have very little running...

Running an 8-minute mile requires discipline and proper training. In addition to running, exercises like swimming, muscle-endurance training and cycling indirectly increase your running speed. Generally, running farther than you need to will help condition your body to handle the stresses of an 8-minute mile. If you have very little running...

Original article and pictures take https://livestrong.com site