Frequence or length

What is the most easy to change…frequence, or length?? is there anything better to have more frequence than length or more length than frequence??thanks

the thing that seperates a great sprinter from a average 1 is fequency. they seem2 have the same stride length bt what alows the 1 guy 2 run sub 10 and the other 10.2, 10.3 is the stride rate.

the tick is 2 take the longest stride possible in the shortest amount of time.

…achieved by shorter ground contact times.