We were talking about being gassed during the running phases -- but my "run" phase is more of a "jog". I can't really run for 60, much less 90 seconds yet.
I believe my "run" (really, my jog) is at about 10mpm, give or take. I wonder why I feel like I'm hitting harder when I take shorter strides -- I am going to make a note to pay specific attention to where my foot lands. I do notice that when I'm jogging, I don't feel the shin soreness as much when I lean further forward.
I can also tell you that during my "run" phases, my heart rate gets up to about 165bpm at about the 60s mark and climbs to about 180 by the 75-80s mark (it reads VO2 Max). It takes me the full 90s walk period to get it back down to the 130's, sometimes a couple few seconds longer.
Thanks for the tip on Running Times! I don't currently subscribe but I will do a quick search for it and see what I can find. I'm going to check around tomorrow and see if there is some place local to me that can watch me jog and tell me what I'm doing wrong.