I want to be able to run fast. Sub (7.5-min / mile) at a marathon distance. I am trying to figure out why I can't run that pace for even 1-mile. I am not interested in endurance yet. Building endurance at a slow pace is not the way I want to train.
Are any of the following bullet points wrong?
- the only variables that influence speed are (1)cadence (2) stride length.
- cadence has a very low upper bound. (170 strides / min) seems as high as possible.
- a stride causes you to be propelled forward, and lifted upward. And, this "lifting upward" side-effect is the real limiting factor.
Therefore, a runner who wants to go as fast as possible need only work on minimizing the ratio of (body weight) / (leg strength), right? Gravity is slowing me down. Is there anything other variable that could possibly make me run fast?
(I already eat an good diet. And, I can't believe hydration matters for runs of just 3 miles).