Ground reaction forces during level ground walking with body weight unloading

Barela, Ana Maria Forti; Freitas, Paulo Barbosa de; Celestino, Melissa Leandro; Camargo, Marcela Rodrigues de; Barela, José Ângelo

doi:10.1590/bjpt-rbf.2014.0058

Cited by 27 publications

(27 citation statements)

References 27 publications

(39 reference statements)

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“…Moreover, the present study showed that forefoot pressure during the terminal stance was significantly lower in the care-need level group than it was in the support-need level group. Previous studies reported that forefoot pressure during the terminal stance was associated with push-off movement 28 ) , and the plantar flexor muscle is a major contributor at this phase 29 ) . Therefore, the present results imply that plantar flexor muscle strength may have differed between the support-need and care-need level groups.…”

Section: Discussionmentioning

confidence: 99%

Foot pressure analysis of gait pattern in older Japanese females requiring different personal care support levels

Takayanagi

Sudo

Fujii³

et al. 2018

J Phys Ther Sci

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[Purpose] This study evaluated gait parameters and foot pressure in two regions of the feet among older females with different personal care support needs to analyze factors that contribute to higher support requirements. [Subjects and Methods] Thirty-two older females were divided into support-need and care-need level groups. Gait parameters (speed, cadence, step length, step width, gait angle, toe angle, double support phase, swing phase, and stance phase) and foot pressure during a 5-m walk were measured and analyzed in the two groups. [Results] The percentage of the double support phase on both feet and the right stance phase were significantly higher in the care-need level group, while that of the right swing phase was significantly lower than that of the support-need level group. Additionally, the phase showing peak pressure on the left rear foot was significantly delayed and the left forefoot pressure in the terminal stance was significantly lower in the care-need level group than in the support-need level group. [Conclusion] These findings show that the temporal duration parameters and foot pressure on a particular side were significantly different between the two groups and suggest that these differences were associated with a higher care level.

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Section: Discussionmentioning

confidence: 99%

Foot pressure analysis of gait pattern in older Japanese females requiring different personal care support levels

Takayanagi

Sudo

Fujii³

et al. 2018

J Phys Ther Sci

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“…The maximum force, which is achieved at heel strike is used as this is the maximum force that the foot will be exposed to during use. This heel strike impact force used is equivalent to 110% of the body weight as per literature [14] [15] [16]. The impact force, F max , was therefore obtained using the conversion, where m is the body weight in kg, and g is acceleration due to gravity, taken as 10 m/s 2 .…”

Section: Structural Analysismentioning

confidence: 99%

Development of a Passive Ankle Foot Prosthesis with Manually Adjustable Ankle Stiffness

Dongo¹,

Ikua²,

Sagwe³

et al. 2019

OJTR

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Major advancements have been made in the field of prosthetics, but devices remain largely out of reach for the amputee population domiciled in the developing nations, which makes up 80% of the entire amputee population of the world. The amputees are left to contend with low function prosthetics that do not mimic the behavior of the natural lost limb, with the long-term use of such devices leading to physical injury to the user. This work was aimed at developing a low-cost ankle-foot prosthesis that affords the user the opportunity to manually alter the stiffness of the ankle, as well storing energy in a forefoot section to aid push-off in late stance. In this paper, the design and results of structural analysis performed on critical parts of the prosthesis are presented, as well as the future direction of the work.

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“…Adaptações musculares também foram apontadas. Estas últimas, contudo, são reportadas apenas sob o critério de intensidade (BARELA et al, 2014a;WOLF, 2015b;SAINTON et al, 2015;WORTHEN-CHAUDHARI;SCHMIEDELER;BASSO, 2015).…”

Section: Os Efeitos Do Suporte Parcial De Pesounclassified

“…O modo de utilização do suporte parcial de peso tem sido reportado sob inúmeras configurações diferentes no que diz respeito à quantidade de diminuição da carga tanto para sujeitos com alterações musculoesqueléticas quanto para sujeitos saudáveis (BARELA et al, 2014a;WATANABE;SOMEYA, 2013). Determinadas características do movimento, tais como a atividade neuromuscular e modificações em parâmetros espaço-temporais são significativamente influenciadas pelo aumento no suporte parcial de peso (FINCH; BARBEAU; ARSENAULT, 1991;LANDER;MORAN, 2017).…”

Section: Introductionunclassified

“…Ou seja, o tempo de apoio unipodal se mostrou menor conforme a ação do suporte se mostrou maior.Achados semelhantes são reportados em estudos prévios(AWAI et al, 2017; FISCHER; DEBBI; WOLF, 2015; FISCHER; WOLF, 2015c). Houve, portanto, aumento da fase de balanço, com provável menor tempo de exposição à carga(BARELA et al, 2014b).Com a análise do comportamento angular das articulações dos membros inferiores foi possível observar algumas mudanças no movimento no que diz respeito às amplitudes e picos angulares.…”

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Respostas cinemáticas e eletromiográficas durante suporte parcial de peso em indivíduos saudáveis

Miyashiro¹

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Partial weight support (PWS) is an intervention method that allows a decrease in body weight by a suspension apparatus, which accommodates elevations and body falls during treadmill walking. It is frequently prescribed for individuals with movement disorders whose treatment programs aims to decrease the loads in the tissues, promoting joint protection and pain relieve. However, little is known about the actual repercussions generated in gait when partial weight support is used. Thus, the present study aimed to verify the effect of speed and PWS on kinematic and electromyographic variables of healthy individuals. Forty nine healthy subjects (18 women), with 28.7 (± 6.7) years of age, body mass of 76.9 (± 14.9) kg, height of 173.3 (± 14.9) took part of the study. They walked in a treadmill at 3 different velocities (2.0 km/h, 4 km/h and at a self-selected pace), and under 4 levels of partial weight suspension: 0%, 20%, 50% and 80%. All volunteers went through the 12 conditions. We found that PWS above 50% at low velocities and at self-selected pace the gait cadence decreases, the balance phase increases, articular amplitudes and hip, knee and ankle peaks decrease. Higher PWS induced a decrease in the electromyographic activity in gluteus medius, rectus femoris, vastus lateralis, biceps femoris, tibialis anterior and lateral gastrocnemius muscles in all gait phases. These results suggest that the suspension has a direct influence in the gait behavior of healthy individuals. It decreases muscle and joint demands without changing its main characteristics, allowing the use of this strategy for joint protection and early return to independent locomotion.

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Ground reaction forces during level ground walking with body weight unloading

Cited by 27 publications

References 27 publications

Foot pressure analysis of gait pattern in older Japanese females requiring different personal care support levels

Foot pressure analysis of gait pattern in older Japanese females requiring different personal care support levels

Development of a Passive Ankle Foot Prosthesis with Manually Adjustable Ankle Stiffness

Respostas cinemáticas e eletromiográficas durante suporte parcial de peso em indivíduos saudáveis

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