We were to run a “big lap” and a “small lap” within the airport. I wasn’t really sure what was meant by that and at one point I wasn’t even sure if I was going in the right direction. Another runner reassured me that I was running the right way when I asked so I continued onward. One part of the track went through a spiral staircase - I accidentally went around twice before getting out of the stairwell. At a certain point, everyone around me started running on all fours. They indicated that it took less effort to do so, so I hunched forwards and did that same.