 There are different types of starts for races of different distances . Middle- and long @-@ distance races mainly use the waterfall start . This is when all athletes begin on a curved line that moves farther out at the outer edge of the track . Competitors are allowed to move towards the inside lane right away , as long as it is safe to do so . For some middle @-@ distance races , such as 800 m , each athlete starts in their own lane . Once the gun fires , they must run in the lane they began in until markers on the track notify them it is time to move towards the inside lane . For sprint races , athletes begin in start blocks and must stay in their own lane for the entire race . 
 <a href='dey_it' title='1'><mark>There</mark></a> are different types of starts for races of different distances . Middle- and long @-@ distance races mainly use the waterfall start . This is when all athletes begin on a curved line <a href='null_relcl' title='2'><mark>that</mark></a><a href='uninflect' title='3'><mark>moves</mark></a> farther out at the outer edge of the track . Competitors are allowed to move towards the inside lane right away , as long as it <a href='drop_aux' title='4'><mark>is</mark></a>safe to do so . For some middle @-@ distance races , such as 800 m , each athlete <a href='uninflect' title='5'><mark>starts</mark></a> in their own lane . Once the gun fires , they must run in the lane they began in until markers on the track notify them it <a href='drop_aux' title='6'><mark>is</mark></a>time to move towards the inside lane . For sprint races , athletes begin in start blocks and must stay in their own lane for the entire race . 
It is diffrent types of starts fir races of different distances . Middle- and long @-@ distance races mainly use da waterfall start . This is when alll athletes begin on a curved line move farther outt at tdaouter edge of the track . Competitors are allowed to move towards thdanside lane right away , as long as it safe to do so . fir sum middle @-@ distance races , such as 800 m , each athlete start in their own lane . Once the gun fires , they must run in the lane they began in till markers on the track notify em it time to move towards thedaside lane . fa sprint races , athletes begin in start blocks and must stay in their own lane ffathe entire race .