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7/28/2019 Marc a Duero

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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.


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.


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



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



= 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).



(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

marc a duero

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