The effect of body weight on joint torques in teenagers: Investigation of sit-to-stand movement

Çilli, Murat; Serbest, Kasım; Kayaoglu, Emre

doi:10.1016/j.clinbiomech.2021.105288

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…However, due to the limitations of subject selection, we did not choose subjects with a high BMI. According to the literature, [ 37 ] high body mass has a great influence on STS motion. It may cause an overload on joints.…”

Section: Discussionmentioning

confidence: 99%

Kinematic analysis of the human body during sit-to-stand in healthy young adults

Xue

Yang

et al. 2021

Medicine

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Sit-to-stand (STS) motion is one of the most important and energy-consuming basic motions in everyday life. Kinematic analysis provides information regarding what strategy or motion pattern is used by the healthy people, and through which, we can understand and obtain the law of the STS motion. The objective of this article is to study the law of STS motion through the experiment to determine a suitable description of STS motion in healthy adults, so as to provide a starting point and bases for future design and control of STS assistive devices. Thirty healthy adult subjects participated in this study and carried out STS motion experiment of standing up naturally. The STS motions were recorded using a high-definition camera. The experimentally collected kinematic data and a link segment model of the human body were used to obtain the coordinates of joints and to calculate the coordinates, velocity, and momentum of center of gravity; the postures of human body during STS are also obtained. The relationship between human body parameters and motion parameters is analyzed by using Pearson correlation method. The STS motion is divided into 4 phases; the phases are differentiated in terms of STS motion characteristics and postures, and momentum of center of gravity of human body. The main factors determining the differences in STS motion among individuals are horizontal distance between hip joint and ankle joint, lower leg length, thigh length, and the length of the transition period. The horizontal distance between hip joint and ankle joint is positively correlated with the duration from motion begin to trunk stops flexing forward ( P = .021 < .05), but not so with the duration from motion begin to the end of phase 2 ( P = .15 > .05). The results suggest that when designing the sit-to-stand assistive devices, one should pay attention to the whole-body posture control in STS motion, such as the posture guidance of trunk and lower leg, and should carry out specific training according to different STS phases. Sit-to-stand assistive devices should provide the same horizontal distance between hip joint and ankle joint for different individuals during the STS motion. Transition period should be properly controlled, and the degree of freedom of the lower leg should not be limited.

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Section: Discussionmentioning

confidence: 99%

Kinematic analysis of the human body during sit-to-stand in healthy young adults

Xue

Yang

et al. 2021

Medicine

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“…During walking, changes in ankle inversion/eversion moment are applied to counteract deviations in side-to-side center-of-mass acceleration, ensuring balance [ 23 , 24 ]. An unexpected ankle moment introduced by an exosuit may disrupt the natural ankle movements, resulting in elevated joint loads and biomechanical alterations [ 25 – 27 ]. These disruptions may increase susceptibility to ankle sprains [ 28 – 30 ].…”

Section: Introductionmentioning

confidence: 99%

Assistance force-line of exosuit affects ankle multidimensional motion: a theoretical and experimental study

Zhang,

Li,

Sun

2024

J NeuroEngineering Rehabil

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Background The talocrural joint and the subtalar joint are the two major joints of the ankle-joint complex. The position and direction of the exosuit force line relative to these two joint axes can influence ankle motion. We aimed to understand the effects of different force-lines on ankle multidimensional motion. Methods In this article, three assistance force line schemes for ankle exosuits were proposed: perpendicular to the talocrural joint axis (PT), intersecting with the subtalar joint axis (IS), and parallel to the triceps surae (PTS). A theoretical model was proposed to calculate the exosuit’s assistance moment. Seven participants completed four experimental tests of ankle plantarflexion, including three passive motions assisted by the PT, PTS and IS schemes, and one active motion without exosuit assistance (Active). Results The simulation results demonstrated that all three exosuits were able to produce significant moments of ankle plantarflexion. Among these, the PT scheme exhibited the highest moments in all dimensions, followed by the PTS and IS schemes. The experimental findings confirmed the effectiveness of all three exosuit schemes in assisting ankle plantarflexion. Additionally, as the assistive force lines approached the subtalar joint, there was a decrease in ankle motion assisted by the exosuits in non-plantarflexion directions, along with a reduction in the average distance of ankle angle curves relative to active ankle motion. Furthermore, the linear correlation coefficients between inversion and plantarflexion, adduction and plantarflexion, and adduction and inversion gradually converged toward active ankle plantarflexion motion. Conclusions Our research indicates that the position of the exosuit force line to the subtalar joint has a significant impact on ankle inversion and adduction. Among all three schemes, the IS, which has the closest distance to the subtalar joint axes, has the greatest kinematic similarity to active ankle plantarflexion and might be a better choice for ankle assistance and rehabilitation.

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“…Among the most widely used, the presence of a support, known to be beneficial for MSD prevention [25,26], is characterized by a localized weighting index. The forces exerted on these supports are not taken into account, even though they can be a source of discomfort and pain, and lead to pathologies [27]. Finally, joint constraints (i.e.…”

Section: Introductionmentioning

confidence: 99%

Global Upper Body Assessment (GUBA) - A new Tool to Identify the Indicators That will lead to the Occurrence of Musculoskeletal Disorders of Light Weight Loads in Seated Position Based Body Mass Index and Postural Strategy

Jacquier-Bret,

Gorce

2024

Int J Health Sci Res

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Musculoskeletal disorders (MSDs) are increasingly prevalent in industrialized countries, and have a major financial impact. Their prevention requires new ergonomic tools to better understand and assess the risks. The objective was to propose the Global Upper Body Assessment (GUBA) tool for investigating indicators that will lead to the occurrence of MSDs in the workplace, in daily life or at home. GUBA was applied to interaction tasks with handheld digital devices weighing from 0 to 1 kg in a sitting position, with or without support for the upper limbs. The GUBA tool was developed in three stages: 1) modeling to quantify joint parameters, joint torques and reaction forces from subject’s BMI, mass handled, and postural strategy; 2) development of risk scales; 3) computation of the GUBA score. A set of abacuses has been created to enable the user to directly read the GUBA score and the corresponding MSD risk level. The abacuses are very easy to use: simply select the abacus for the situation (sitting with or without support), choose the table corresponding to the mass handled, identify the user's BMI, choose the postural strategy, and finally read the GUBA score at the end of the line. Key words: Musculoskeletal disorders; ergonomic assessment; posture; joint load; support; smartphone; handheld digital devices.

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The effect of body weight on joint torques in teenagers: Investigation of sit-to-stand movement

Cited by 11 publications

References 18 publications

Kinematic analysis of the human body during sit-to-stand in healthy young adults

Kinematic analysis of the human body during sit-to-stand in healthy young adults

Assistance force-line of exosuit affects ankle multidimensional motion: a theoretical and experimental study

Global Upper Body Assessment (GUBA) - A new Tool to Identify the Indicators That will lead to the Occurrence of Musculoskeletal Disorders of Light Weight Loads in Seated Position Based Body Mass Index and Postural Strategy

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