<human>: Can you succinctly summarize the text in 1-3 sentences?

For the past two years I have almost strictly been a runner, never doing any other workout and possibly pushing myself too hard. For the majority of the first year or so I ran on treadmills all the time and not the track or outside. Within the past few months I finally started running outside, usually two or three miles. 

Near the beginning of the summer I started feeling a dull pain in my right knee which slowly turned into a limp. Visiting the doctor he said I had runner's knee and that I should take it easy and start wearing a brace. However, a few weeks later, the problem is still there. In order to combat this I have been using an inclined treadmill for cardio. 

At 10% incline (the highest my treadmill can do), 4.4 MPH, and 30 minutes of doing so I am working up quite a sweat. However, I am worried that I may start sucking at running (I am waiting to have an MRI done tomorrow before I start running outside again). 

So, my question is this: 

What are the benefits of this workout I have been doing?
<bot>: Painful knee issues, been using inclined treadmill for a week, haven't run since, am freaking out. What are the benefits of this workout?