I used this podcast this morning -- I found that I was quite easily able to complete the 35 minutes non-stop running without really raising my breath very much at all.
BUT -- my legs found it to be excruciatingly painful. I think it is because running to the beats of the music (starts at 158 for 10 minutes, goes to 160 for 20 minutes and finishes with 5 minutes of 165) is too slow for me. To feel comfortable, I have to start at around 165BPM. I am going to give the original podcast a few more goes - but I have increased the BPM tempos by +6% and I think that ultimately that will suit me better to run to. I do like to run to music - but the beat really has to be right for me -- otherwise forget it!!!!