BTW, you don't need to run for long, it depends on your goals. A 20 or 30 minute run is a killer if you push the intensity. A mile is a huge distance to run if you break it into sprints at max effort (speed). Try uphill sprints sometime, exactly like short max uphill bike intervals. A couple of minutes worth will be killer. It's not only about long distance slow runs, why limit yourself like that?
Always ask yourself why you're doing it and what your goals are, then with some research you'll know what to do.
Intriguing...what would sprints do for you from a fitness pov? Since we're looking at this from a bike-centric view, which is more long grind vs. quick hit. Thanks for the info though, never really thought about grass running.:hmmm:
I ran at a very high level in high school but chose to quit after my soph year due to several physical issues including: alignment problems with my hips, knees and ankles, tendenitus and Osgood Shlatters. went to a specialist who basically told me to hand up the cleats. the only way I would be able to continue to run would be with the use of orthotics (and even then he made no guarantees)