Standardization and definitions of the sit-stand-sit movement cycle

Kerr, K.M.; White, JA; Barr, D.A.; Mollan, Rab

doi:10.1016/0966-6362(94)90006-x

Cited by 52 publications

(41 citation statements)

References 20 publications

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“…Actually, this motor task calls for the production of mechanical work to increase the potential energy of the body. Therefore patients with musculo-skeletal pathologies of the lower-limbs (KERR et al, 1994) and even elderly people without specific pathologies (HUGHES et al, 1994) can find standing up considerably difficult. People presenting paralysis of the lower-limb muscles (e.g.…”

Section: Introductionmentioning

confidence: 99%

Standing-up exerciser based on functional electrical stimulation and body weight relief

Ferrarin

Pavan

Spadone

et al. 2002

Med. Biol. Eng. Comput.

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The goal of the present work was to develop and test an innovative system for the training of paraplegic patients when they are standing up. The system consisted of a computer-controlled stimulator, surface electrodes for quadricep muscle stimulation, two knee angle sensors, a digital proportional-integrative-derivative (PID) controller and a mechanical device to support, partially, the body weight (weight reliever (WR)). A biomechanical model of the combined WR and patient was developed to find an optimum reference trajectory for the PID controller. The system was tested on three paraplegic patients and was shown to be reliable and safe. One patient completed a 30-session training period. Initially he was able to stand up only with 62% body weight relief, whereas, after the training period, he performed a series of 30 standing-up/sitting-down cycles with 45% body weight relief. The closed-loop controller was able to keep the patient standing upright with minimum stimulation current, to compensate automatically for muscle fatigue and to smooth the sitting-down movement. The limitations of the controller in connection with a highly non-linear system are considered.

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Section: Introductionmentioning

confidence: 99%

Standing-up exerciser based on functional electrical stimulation and body weight relief

Ferrarin

Pavan

Spadone

et al. 2002

Med. Biol. Eng. Comput.

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“…All subjects were 22 years old. Thus, the normality and efficiency of the movement have been identified without the influence of ageing, which suggests that, similar to human gait, strategies of rising from a chair might also differ [18]. Other studies have found that the elderly demonstrate greater forward lean of the trunk, perform the activity of rising more slowly, and adopt different strategies in performing the activity of rising [25].…”

Section: Kinematics and Kinetics Parametersmentioning

confidence: 94%

“…In the present paper, SI and its variations were a way to determine the parameter on the basis of which it was possible to identify stand-to-sit and sit-to-stand movement phases. The stand-to-sit and sit-to-stand movement cycle could benefit from a similar approach to that used to define the gait cycle, but only 2 studies [10,18] have attempted to establish a definitive framework within which the standto-sit and sit-to-stand movements can be analyzed. Kralj et al [10] presented a formal definition of human standing up and sitting down movements based on the sagittal plane goniometric and force plate data from 20 normal subjects.…”

Section: Kinematics and Kinetics Parametersmentioning

confidence: 99%

“…This definition consisted of defined characteristic events selected on changes in ground reaction forces and relative time intervals between them. Kerr et al [18] distinguished 14 phases for the entire movement cycle: 7 for the descending and 7 for the rising phase based on the linear displacement and acceleration of the trunk and angular displacement of the knee (Table 1). of these muscles when the muscles are lifting the body up to the upright position.…”

Section: Kinematics and Kinetics Parametersmentioning

confidence: 99%

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

Błażkiewicz¹,

Wiszomirska²,

Wit³

2014

International Journal of Occupational Medicine and Environmental Health

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Objectives: Determination of the phases in a stand-to-sit-to-stand task based on a derivative of the parameter with the lowest variance calculated based on the modified symmetry index. Material and Methods: The study group comprised 11 healthy women and 11 healthy men from the University of Physical Education in Warsaw. The examination of the kinematic and kinetic parameters of sitting down and standing up from a chair was carried out using the Vicon Mx system and Kistler force platforms. Results: The modified symmetry index was employed to select the parameters used to choose those with the lowest variance. Consequently, the phases in a stand-to-sit-to-stand task were determined. Conclusions: It was demonstrated that the task of sitting down is a reverse task with respect to standing up in terms of the symmetry of the parameters analyzed.

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“…These outcome measures simply ask the person to report or demonstrate if they can stand or sit independently or if assistancewith armrests or a caregiver -is required (Legro et al 1998;Gailey et al 2002 A c c e p t e d M a n u s c r i p t For quantitative assessments, the StTS activity can be divided into predictable phases, which are separated by identifiable events (Figure 1). Current methods for identifying these phases require the analysis of various kinematic and kinetic parameters of the lower limbs and trunk, in addition to an instrumented chair (Kralj et al, 1990;Kerr et al, 1994). The equipment needed for measuring these biomechanical parameters can be expensive (e.g.…”

Section: Introductionmentioning

confidence: 99%

Analysis of weight distribution strategies in unilateral transtibial amputees during the stand-to-sit activity.

Agrawal

O’Toole²,

Gaunaurd

et al. 2015

Ergonomics

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Standardization and definitions of the sit-stand-sit movement cycle

Cited by 52 publications

References 20 publications

Standing-up exerciser based on functional electrical stimulation and body weight relief

Standing-up exerciser based on functional electrical stimulation and body weight relief

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

Analysis of weight distribution strategies in unilateral transtibial amputees during the stand-to-sit activity.

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