 Runners start the race from a standing position along a curved starting line and after hearing the starter 's pistol they head towards the innermost track to follow the quickest route to the finish . In 800 m races athletes begin at a staggered starting point before the turn in the track and they must remain in their lanes for the first 100 m of the race . This rule was introduced to reduce the amount of physical jostling between runners in the early stages of the race . Physiologically , these middle @-@ distance events demand that athletes have good aerobic and anaerobic energy producing systems , and also that they have strong speed endurance . 
 Runners start the race from a standing position along a curved starting line and after hearing the starter <a href='null_genetive' title='1'><mark>'s</mark></a>pistol they head towards the innermost track to follow the quickest route to the finish . In 800 m races athletes begin at a staggered starting point before the turn in the track and they must remain in their lanes for the first 100 m of the race . This rule was introduced to reduce the amount of physical jostling between runners in the early stages of the race . Physiologically , these middle @-@ distance events demand that athletes <a href='got' title='2'><mark>have</mark></a> good aerobic and anaerobic energy producing systems , and also that they <a href='got' title='3'><mark>have</mark></a> strong speed endurance . 
Runners start da race from a standing position along a curved starting line and after hearing the starter  pistol they head towards tdainnermost track to follow thdauickest route to the finish . In 800 m races athletes begin at a staggered starting point b4 the turn in the track and they must remain in their lanes for thedarst 100 m of the dae . This rule was introduced to reduce the adant of physical jostling between runners in the early stages of the race . Physiologically , these middle @-@ distance events demand dat athletes got gud aerobic and anaerobic energy producing systems , and also that they got strong speed endurance .