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Silva, Davida; Gabriel, Ronaldob; Moreira, Mariac; Abrantes, Jood; Faria, Aurlioe
a Department of Sport Sciences, Exercise and Health, UTAD, Vila Real, Portugal, [email protected];b Department of Sport Sciences, Exercise and Health, CITAB, UTAD, Vila Real, Portugal, [email protected];c Department of Sport Sciences, Exercise and Health, CIDESD, UTAD, Vila Real, Portugal, [email protected];d MovLab, CICANT, University Lusfona of Humanities and Technologies, Lisboa, Portugal, [email protected] ;e Department of Sport Science, CIDESD, UBI, Covilh, Portugal, [email protected].
TEMPORAL PARAMETERS OF FOOT ROLL-OVER DURING WALKING WITH
AND WITHOUT DIRECTION CHANGES IN POSTMENOPAUSAL WOMEN
Vila Real, 14 de Maio de 2013
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INTRODUCTION AND PURPOSE OF STUDY
GENERAL OVERVIEW
MATERIALS AND METHODS
RESULTS
DISCUSSION
SUBJECTS
INSTRUMENTS AND PROCEDURES
CONCLUSIONS
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(1) Sievert, L., & Goode-Null, S. (2005). Journal of Cross-Cultural Gerontology, 20(2), 127-140.
INTRODUCTION AND PURPOSE OF STUDY
Menopause is associated with: decreased bone mineral density, skeletal fractures,
loss of feeling in hands/feet, joint pain and other musculoskeletal complaints (1).
(4) Faria et al., (2010).Clinical Biomechanics, 25(6), 588-593. 4
(2) Woolley et al., (1997). The Journals of Gerontology. 52A(2), M80-M87.(3) Gilchrist, L. (1998). Clinical Biomechanics, 13(2), 91-97.
Older women have a lower ability to perform simple moving side-step manoeuvrewhen compared to young adults (3).
Musculoskeletal changes due to aging could influence the structure and functionof the foot (4).
During daily activities, there are many changes of direction which are associatedwith an increased risks of falls (2).
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(1) Orlin, M. N., & McPoil, T. G. (2000). Physical Therapy, 80(4), 399-409
(2) Rosenbaum, D., & Becker, H. P. (1997). Foot and Ankle Surgery, 3(1), 1-14.
(3) De Cock et al., (2005). Gait & Posture, 21, 432-439.(4) Willems et al, (2005). Gait &Posture, 21, 379-387.
(5) Warren et al., (2004). Gait & Posture, 19, 91-100.
INTRODUCTION AND PURPOSE OF STUDY
Understanding the role of plantar pressure can provide importantinformation:
Purpose of study
To compare the temporal characteristics of foot roll-over between the following
tasks: (T1) walking straightforward; and (T2) walking forward with side-cut at 45
How the various structures of the foot during foot-ground interact (1-2).
Prevention, diagnosis and treatment of lower limb disorders (3-5).
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TASKS
INSTRUMENTS AND PROCEDURES
MATERIALS AND METHODS
2-step protocol (1)
(1) Bus, S. A., & Lange, A. D. (2005). Clinical Biomechanics, 20, 892-899.
= 45
TASK 1
TASK 2
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The contact of the foot with the pressure platform was incompleteThe participant targeted the platform
The coefficient of variation of the duration of foot contact was greater than 4% (4-6)
(1) Houck et al., (2006). Gait & Posture, 24(3), 314-322.(2) Monteiro et al,(2010). Maturitas, 67(2), 178-185
(3) Bus, S. A., & Lange, A. D. (2005). Clinical Biomechanics, 20, 892-899
INSTRUMENTS AND PROCEDURES
MATERIALS AND METHODS
= 45
TASK 1
TASK 2
A Trial was discarded if:
The right foot as the dominant foot (1)
Practice period of ten minutes (2)
Subjects walked barefoot at a self-selected speed (2)
Five valid trials were collected (3)
Trials
(4) Burnfiel et al., (2004). Clinical Biomechanics, 19, 78-84.(5) Chuckpaiwong et al., (2008). Gait & Posture, 28, 405-411.
(6) Warren et al., (2004). Gait & Posture, 19, 91-100.
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Instants and Phases of Foot Contact (Footscan Software 7.1, RSscan International)(1).
INSTRUMENTS AND PROCEDURES
MATERIALS AND METHODS
(1) De Cock et al., (2005). Gait & Posture, 21, 432-439.
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Variables % T1 T2 Mann-Whitney
IC T2-5 57,6 10,2 46,7 14 P < 0,01
IC M5 22,9 10,3 18,2 12 P < 0,01
IC MF 8,3 3,1 4 1,8 P < 0,01
FC M3 94,8 1,4 93,4 1,6 P < 0,01
FC M4 92,5 1,6 90,2 2 P < 0,01
FC M5 84,3 4,8 82 4,7 P < 0,01DC T2-5 38,8 10,5 48,9 14,3 P < 0,01
HL, HM, MF, M4, M3, M5, M2, M1, T2-5, T1
HL, HM, MF, M3, M4, M2, M5, M1, T1, T2-5
Inicial Contact
HL, HM, MF, M5, M4, M3, M1, M2, T2-5, T1
HL, HM, MF, M5, M4, M1, M3, M2, T2-5, T1
Final Contact
Task 1
Task 2
RESULTS
Contact patterns of the plantar pressure areas
HM Heel Medial
HL Heel LateralMF Midfoot
M1- M5 - Metatarsal areasT1 Halux
T2-5 ToesIC - Initial ContactFC - Final Contact
DC -Duration Contact
Plantar pressure areas
HL, HM, MF, M4, M3, M5, M2, M1, T2-5, T1 HL, HM, MF, M5, M4, M3, M1, M2, T2-5, T1
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Variables % T1 T2 Mann-Whitney
FFPOP 42,4 6,8 42,8 8,6 P < 0.01
11,4
11,3
26
22,5
20
19,7
42,8
42,4
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
T2
T1
ICP FFCP FFP FFPOP*
RESULTS
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Early final contact in M3, M4 and M5
The right foot must accommodate the necessary changes to accomplish the change of
direction which can be achieved by the inward foot rotation during the side-cut task which
tends to induce the most lateral metatarsals to lose contact earlier(1).
(1) Patla et al., (1999). Experimental Brain Research, 129(4), 629-634.
DISCUSSION
Increase in duration found for the toe 2-5 and FFPOP phase.
During the side-cut activities, subjects tended to initiate CoM movement towards the stance
foot and carried out the turn after completing the weight acceptance (2).
Initial and final contact sequences
The sequence in which different foot areas touch the ground is relevant because it allows us
to distinguish between normal and pathological gait (3, 4, 5) .
(3) Blanc et al., (1999). Gait & posture, 10(2), 97-108.(4) Willems et al., (2006). Gait & posture, 23(1), 91-98.
(5) Monteiro et al,(2010). Maturitas, 67(2), 178-185
(2) Houck et al., (2006). Gait & posture, 24(3), 314-322.
Early initial contact in MF, M5 and T2-5
The early contact of those areas, may enable a major stability of the plantar pressure.
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There are differences on temporal characteristics of foot roll-over, between
walking forward and walking with a side-cut maneuver at 45.
CONCLUSIONS
Walking with a side-cut maneuver at 45, changes the sequence in which
different foot areas make the first and final contact with the ground.
The results suggest that:
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Thankyou
foryour
attention!
TEMPORAL PARAMETERS OF FOOT ROLL-OVER DURING WALKING WITH
AND WITHOUT DIRECTION CHANGES IN POSTMENOPAUSAL WOMEN