grouse grind

the last time I went to the grouse grind was a year ago with my soccer team. It was very difficult because it is an up hill incline all the way. It was tough but I finished it less than 45 mins. . Half way I was starting to feel it in my legs a lot more and my body temp was rising.  My breathing rate was high at the end but it was not that bad because I kept one pace through out the grind. It was aerobic because my heart rate was increasing and was high endurance activity. I was also around zone 4 at the end.