There was a discussion elsewhere recently about a hs runner
with a very slow stride rate and how to improve this. The
quoted paragraphs below were posted by Jack Daniels PhD
himself. As this is a fairly common discussion item here, I
thought this might be of some interest.
"Encourage him to try to be light on his feet; not
necessarily on his toes, but hitting the ground with light,
quick steps. Stride rate is a voluntary thing and a runner
can pretty much be in control of rate. Stride length, on the
other hand, is more a function of fitness. Get the rate
right first then as he gets fitter the stride length can
increase without sacrificing rate. Slow trunover is
associated with higher displacement of the center of mass,
which means hitting the ground harder with each landing and
that reduces economy and increases chances of injury. Run
over the ground, not into it. Have him try counting his
stride rate at different stages of a run, and make self
corrections if it is too slow."
"We counted rate (and calculated length by also timing 200-
meter segments of the races) of runners (both men and
women) in the 800, 1500, 3k (flat for women and steeple for
men), 5k, 10k and marathon, and found that from 3k on up
rate was about the same, so only length made the difference
in run velocity. The 1500 runners do go faster (over 100 is
not unusual) and the 800 even faster. Their faster rates
are not always the most economical, but economy is not
necessarily the most important thing for these shorter
races. These same 1500 runners who may go over 100 (I refer
to right-foot falls, so it is really twice as many steps --
since most runners take the same number of steps with the
left foot as they do with the right, it's safe to double
the right-foot falls) are down around the 90 rate at slower
training speeds."
"Chances are the taller people will turn over a little less
than very short people. However,one of our top distance
runners of the 60s and 70s, who was an inch or two taller
than you, used to go about 180. Probably good to go with the
most comfortable rate. If you could get tested sometime it
wouldn't be hard to pin it down more exactly."
Lyndon "Speed Kills...It kills those that don't have it!"
--US Olympic Track Coach Brooks Johnson