A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

Błażkiewicz, Michalina; Wiszomirska, Ida; Wit, Andrzej

doi:10.2478/s13382-014-0280-x

Cited by 8 publications

(8 citation statements)

References 27 publications

(34 reference statements)

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“…The sit-to-stand and stand-to-sit movements are symmetric movements [4] and, according to [5], they can be divided into two phases. In the first one, there is two contacts between the subject and the environment, which are the contact between the pelvis and the chair and the contact between the feet and the ground.…”

Section: Introductionmentioning

confidence: 99%

Kinematic and kinetic study of sit-to-stand and stand-to-sit movements towards a human-like skeletal model

Pinheiro

Lopes

Moreira

et al. 2019

2019 IEEE 6th Portuguese Meeting on Bioengineering (ENBENG)

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The movements of sit-to-stand and stand-to-sit are frequently executed on daily life. To develop robotic assistance devices for people with mobility problems, it is important to study how a healthy human performs these tasks. The goal of this study is to present a mathematical model based on acquired kinematic and kinetic data that represents a healthy human body performing these movements. The results revealed that the movements of sit-to-stand and stand-to-sit have symmetric joint angles, torques and ground reaction force. The joint angles and the torques are very similar on each leg. The knee and the hip show more variation of the angle and achieve higher values of torque in comparison to the ankle. Although, ankle has higher torque during standing position. The ground reaction force show that is necessary create a force additional to the standard weight force to achieve a more stable position that is sitting or standing. The acquired data describe as expected the sit-to-stand and stand-to-sit movements and can be used to validate the presented model.

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Section: Introductionmentioning

confidence: 99%

Kinematic and kinetic study of sit-to-stand and stand-to-sit movements towards a human-like skeletal model

Pinheiro

Lopes

Moreira

et al. 2019

2019 IEEE 6th Portuguese Meeting on Bioengineering (ENBENG)

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show abstract

“…Previously, some authors studied the phases of habit development during STS activity from a biomechanical aspect and used it for optimization analysis ( 16 , 21 ). The kinematic and kinetic data suggested that STS movement cycle could be divided into four or five phases ( 22 – 24 ).…”

Section: Introductionmentioning

confidence: 99%

“…However, which specific phases are particularly crucial during the STS motion remains unclear. Previous studies on STS motion reported a wide variety of testing protocols, including difference in seat height, initial joint angle, and foot placement which led to different kinematic and kinetic results and conclusions ( 16 , 21 – 24 ). In addition, the kinetic and kinematic characteristics of the timing and transitional points during STS cycle were seldom explored.…”

Section: Introductionmentioning

confidence: 99%

The Crucial Changes of Sit-to-Stand Phases in Subacute Stroke Survivors Identified by Movement Decomposition Analysis

Mao

Zhao

et al. 2018

Front. Neurol.

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ObjectiveThe aim of this study was to detect the key changes during sit-to-stand (STS) movement cycle in hemiparetic stroke survivors using a five-phase kinematic and kinetic analysis.MethodsTwenty-five subacute stroke survivors and 17 age-matched healthy adults participated in this study. The kinematic and kinetic parameters during STS cycle were measured using three-dimensional motion analysis system with force plates. The five standard phases of STS cycle were identified by six timing transitional points.ResultsLonger total time as well as larger changes were observed at the initial phase (phase I, 0.76 ± 0.62 VS 0.43 ± 0.09 s; p = 0.049) and at the end of hip and knee extension phase (phase IV, 0.93 ± 0.41 VS 0.63 ± 0.14 s; p = 0.008) in the stroke group than healthy group. Time to maximal knee joint moment was significantly delayed in the stroke group than in the control group (1.14 ± 1.06 VS 0.60 ± 0.09 s, p < 0.001). The maximal hip flexion was lower during the rising phase from seated position on the affected side in the stroke group than in the control group (84.22° ± 11.64°VS 94.11° ± 9.40°; p = 0.022). Ground reaction force was lower (4.61 ± 0.73 VS 5.85 ± 0.53 N, p < 0.001) in the affected side of the stroke group than in the control group. In addition, knee joint flexion was significantly lower at just-standing phase (T4) and at end point (T5) (5.12° ± 5.25° VS 8.21° ± 7.28°, p = 0.039; 0.03° ± 5.41° VS 3.07° ± 6.71°, p = 0.042) on the affected side than the unaffected side. Crucial decrease of knee joint moment at abrupt transitory (T2) and the maximal moment was also observed on the affected side in comparison with the unaffected side (0.39 ± 0.29 VS 0.77 ± 0.25 Nm/kg, p < 0.001; 0.42 ± 0.38 VS 0.82 ± 0.24 Nm/kg, p < 0.001).ConclusionThe findings of movement decomposition analysis provided useful information to clinical evaluation of STS performance, and may potentially contribute to the design of rehabilitation intervention program for optimum functional recovery of STS after stroke.

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“…Discussion:-Interpretation:-Common abilities of daily living include the capability of rising from a seated position and to sit down from a standing position (Kralj et al, 1990). STS task requires an adequate postural control and appropriate strategy in order to be performed successfully (Błażkiewicz et al, 2014).…”

Section: Figure 2 Aandb:-peak Knee Extensor Moments During Stand To Sitmentioning

confidence: 99%

Foot Placement Effects the Proportion of Maximal Knee Extensor Moment Produced in Sit to Stand and Stand to Sit Activities.

Emük¹,

Şengül²,

b³

2018

IJAR

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A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

Cited by 8 publications

References 27 publications

Kinematic and kinetic study of sit-to-stand and stand-to-sit movements towards a human-like skeletal model

Kinematic and kinetic study of sit-to-stand and stand-to-sit movements towards a human-like skeletal model

The Crucial Changes of Sit-to-Stand Phases in Subacute Stroke Survivors Identified by Movement Decomposition Analysis

Foot Placement Effects the Proportion of Maximal Knee Extensor Moment Produced in Sit to Stand and Stand to Sit Activities.

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