pe

average speed decline in a 15 km race because of the continuous nature of the event no time allowed for the breakdown removal of accumulation metabolic by products then inhibit muscular contraction then increase reliance on aerobic system which has lower rate of ATP synthesis

glycogen depletion only happened in two hours plus events

Open or close skills is to try variability which can be limited or high predictability of environment and internally or externally paste

increase in heart rate of exercise assist with more oxygen to be distributed to assist with the removal of metabolic byproducts