Grouse grind

1. The grouse grind was an extremely difficult task for me even though I finished it. I was already breathing heavily about 5 minutes into it. If i was breathing heavily then my legs were sore. Steps grew steeper and my legs were throbbing harder. I was sweating like a pig very quickly.

2. I believe we use the aerobic energy system due to long endurance we went through as well anaerobic glycolysis because we would grow tired after two minutes and our legs would be very sore.