The force platform
data were down-sampled to 100 Hz and filtered using an eighth-order Butterworth low-pass filter with a cutoff frequency of 20 Hz.
Following the protocol of Williams and Walmsley (2000), after a prior 15-min warm-up the fencers received instructions to remain motionless in their habitual en garde position, placing their feet on the two force platforms
, A and B.
Standing balance in healthy-subjects-evaluation of a quantitative test battery on a force platform
Figure 1 depicts exemplar EMG and force platform
recordings from the quiet stance assessment.
Foot placement on the NeuroCom Balance Master[R] force platform
was standardized with the medial malleoli aligned with the dark blue line, the heel at the "M" line as marked on the force platform
, and with crutch tips set inside the corners of the blue box on the force platform
The scientists used a force platform
- a device similar to a weighing machine - to measure the impact of each fall made by the 12 volunteers, all of whom were experienced in martial arts.
Using a force platform
, the researchers were able to measure the force of each fall and compare this to known information about the amount of impact a patient with osteoporosis can withstand.
Both subjects were asked to walk normally with their own shoes at a self selected speed on a flat surface and pass one leg at a time over a Kistler[R] force platform
that was placed in the middle of the 8m walkway.
For the Landing Test, we used a force platform
to measure three dimensional ground reaction force variability after landing on one leg, principally in the mediolateral direction (Goldie et al 1989).
The SOT measures the extent of a patient's sway while he or she is standing on a force platform
during six conditions (see "Components of the SOT").
Built on the new Terra Force platform
, the integrated system has five components: insole plate, midsole, internal and external shanks, and slip-resistant Bobcat TF out-soles.
The Terra Force platform
and Boulder TF lugged outsole provide stability and traction.