A significant interaction between BWS and velocity was found F(df=6) = 3.613, p = 0.004, indicating that the association of velocity and V[O.sub.2] may vary across levels of BWS.
For V[O.sub.2] on the regular treadmill, the largest standard deviation was 4.4% of the mean (at 8min mile pace, 3.35 m x [s.sup.-1]), while the standard deviation on the LBPP treadmill was between 7.2% (at 7 minute x [mile.sup.-1] (3.84 m x [s.sup.-1]) pace at 20% BWS), and 14.3% of the mean (at 5 minute x [mile.sup.-1] pace (5.36 m x [s.sup.-1]) at 40% BWS.
Comparison of the velocity vs gross V[O.sub.2] relationships at the different levels of BWS showed slopes ([DELTA]V[O.sub.2]/[DELTA]v) of the equations significantly decrease as BWS increases (p < 0.001).
This is the first study to assess the metabolic demand of running on an LBPP treadmill among elite runners across this wide range of speeds and several different levels of BWS. The first hypothesis, that the metabolic cost of running would decrease as BWS increased, was supported, as there was a significant decrease in metabolic cost across levels of BWS.
The slower natural cadence of participants in this study at [greater than or equal to] 40 percent BWS supports previous research indicating that at higher levels of BWS individuals have difficulty moving their center of mass over their base of support .
This indicates that, at higher levels of BWS, individuals spend significantly more time balancing a portion of their body weight on one limb, while the opposite limb completes swing phase.
Future studies using the ZeroG that impose restrictions to step length (e.g., using floor tape markers) and walking velocity (e.g., using a metronome) would provide important information into the potential interaction effect of these two factors with changing levels of BWS while using this device.
Remarkably, the results of the Argentine BW trapping program show that the BWs' southwestern (downwind) migration in direction to the main Argentine cotton cropping area was always lower than expected (E.
As described by several authors, the highest BW trapping catches where reached after cotton harvest, which is coincident with the massive migration of BWs from southern Paraguay to Argentina (Misiones and Formosa provinces) in the fall (Gomez et al., 1996; dos Santos, W.
2), where no cotton is grown, suggests that BWs are attracted to citrus orchards volatiles and that such habitats are probably overwintering areas.
BWS believes that marine and energy industries are the driving forces of global business in today's world and providing risk solutions to this sector is like insuring the welfare of every economy around the world.
BWS enjoys a proven track record in this core sector, which encompasses a wide range of businesses including the traditional oil and gas industry, as well as the emerging renewable resources such as wind, solar and others.