Today was W6D2. Run for 10 mins and walk for 3, then run for 10. I did the first 10 pretty well, and HR hit 170 with about 1 min left @ 5.5mph. Hr dropped to 135 at the end of the 3min walk @ 3.5 mph. The second 10 mins were a little tough as I could feel some anxiety trying to set in, but kept on. I finished that 10 and could not believe I had finished it. HR topped out @175 @ 1 min to go. At the end of 5min cool down Hr was 120. I still felt really faint during both walks. Not sure what is going on here, I eat an apple 1hour before and had some gatorade and have been drinking water all day. As long as I was running I felt fine but about a minute after slowing and walking it starts. I finished up at 2.0 miles in 25 mins which is a 12;3 avg. with the 3 min walk in between.