PDA

View Full Version : Looking for Oscar Pistorius' step frequency.



tandresen
05-21-2008, 11:25 PM
Hello Colleagues,

I've been trying to fit Oscar Pistorius' performance into the spring mass
model. I found his height (1.68 m) and mass (80.6 kg) and estimated his leg
length from Winter's Table (0.53H). I tried to determine his step frequency,
but the film quality is too course. It looks like it is about 3.7 Hz. Does
anyone have a video of him in competition that they can use to estimate his
step frequency?

An estimate of his CM displacement (5–7 cm) or the aerial time (130-160 ms)
would also be very helpful.

I want to use the model to calculate his gait parameters, such as,
spring-leg compression, specific mechanical power output (w/kg) and duty factor and
compare them with those of able-bodied runners.

I processed a few sample runs with the model. They are at

_http://members.aol.com/MathPhysicsModel/OscarPistorius.jpg_
(http://members.aol.com/MathPhysicsModel/OscarPistorius.jpg)

Ted Andresen
St. Petersburg, FL





**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)