
diameter smaller than the height of the lifter. In a tire shown by Hedrick (Hendrick, 2008) the di
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ameter appears to be about 1.25-1.3 m. It is not suggested that these sizes are in any way desired
by the authors or coaches. In that these tires are typically discarded used truck tires, the strength
coaches have had to live by the adage, “beggars can’t be choosers” and take what they can find.
A 50 inch (1.27m) tire is used for illustration in Figures 19 and 20. In Figure 19, the same starting
height (5 inches) is used as was on both FLIPPER simulated models (TS-03 and TS-04). In Figure
20, the same vertical height is reached with an estimated hand grip position. Here the angle of
inclination of the 50 inch tire is 22 degrees, as compared to the 17 degrees on the TS-03 and 16
degrees on the TS-04. Using the same model as with the simulated FLIPPER models, this produces
a starting foot position of 9.3 inches behind the edge of the tire as is shown in Figure 19.
Is optimal positioning for the second pull phase the best criteria for foot placement? In many
cases in training athletes for sports, where speed-strength power is desired, yes it may be. The
movement from first pull to transition is likely desired to be a fluid continuous motion. To accom
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plish this, there is not time to step forward and reposition the lifter between phases. To be off
balance and on one foot may also not be desirable if the lifter is in the action of stepping when
the maximal power should be applied (Waller, et al., 2003).
When lifting closer to the 1RM (1 repetition maximum) of a lifter, the rate of assent will be greatly
reduced, as with any lift. Therefore, the transfer of kinetic energy from the first pull to the second
pull will be minimal. In this case, it may be desirable to reposition the lifter under the FLIPPER in
preparation for the second pull. When that happens, the lifter’s starting foot position may not be
as much of a contributing factor to the optimal foot position for the second pull.
The highest load to the lifter is at the beginning of the first pull, not to be confused with the high
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est power output of the second pull phase. As the FLIPPER is lifted, the center of gravity moves
closer to the point of contact with the ground, thereby reducing the torque required to continue
the lift. The primary muscles used in the first pull are the extensor muscles of the legs and hips.
A lifter can lift more from a rack pull where the bar is 18 inches off the floor as compared to a
Using the Flipper - Foot Placement
17
9.3
23.5
5°
5.0
Fig 19
Содержание Flipper TS-03
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Страница 17: ...Fig 11 Start of second pull Side Lift Fig 12 Transition phase Side Lift Fig 13 Push phase Side Lift 12 ...
Страница 33: ...Using the Flipper Using Loading Charts 28 Fig 29 A End B End 75 lbs on each pin 45 25 5 75 10 lbs on each pin ...
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Страница 54: ...Produced by MILO Fitness LLC Fort Collins CO 80525 970 689 3636 Flipper MiloFit com www MiloFit com ...