Publications by authors named "Ingyu Yoo"

Background: The emotional management of workers can not only increase the efficiency of work, but also contribute to the improvement of the productivity of a company.

Objective: This scoping review surveyed the literature to identify the relationship between postural expression and emotion during sedentary tasks.

Methods: We searched relevant literature published up to December 1, 2019 using seven electronic databases (PubMed, CINAHL, Embase, Web of Science, PsycINFO, IEEE Xplore, and MEDLINE Complete).

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Background: As interest in job-related psychology increased, the need to focus on understanding workplace stress was emphasized. Negative emotional states such as anxiety and stress permeate the organization and, if uncontrolled, can negatively impact the health and work performance of workers. Therefore, attempts to analyze various signals to understand human emotional states or attitudes may be important for future technological development.

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[Purpose] The purpose of this study was to investigate the effects of the thickness of a wheelchair backrest provided for support and comfort on upper arm and trunk muscle load during wheelchair propulsion by using accelerometers. [Subjects and Methods] The Fourteen healthy participants were enrolled in this study. The study compared effects of three backrest conditions including no pad, a 3-cm-thick lumbar pad, and a 6-cm-thick lumbar pad.

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Background: Previous research has suggested eliminating certain types of manual material handling (MMH) work by recommending specific arm angles and postures to avoid, such as arm flexion or abduction over 90°. MMH with arm flexion over 90° can require lifting objects as well as lowering objects. However, few studies have evaluated MMH work while lowering objects in detail.

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[Purpose] The purpose of this study was to determine the effects of chewing gum on driving performance in a driving simulator. [Subjects] In total, 26 young licensed drivers participated. [Methods] The driving scenario was typical of an urban environment: a single-carriageway, two-way road consisting of a mix of curved and straight sections, with considerable levels of traffic, pedestrians, and parked cars.

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[Purpose] This study investigated the optimal thickness of the wheelchair backrest for lumbar load and increased comfort. [Subjects] Fifteen healthy people participated. [Methods] The study examined three randomized backrest conditions: no pad; a 3-cm-thick lumbar pad; and a 6-cm-thick lumbar pad.

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[Purpose] This study aimed to confirm the specialization of interlimb transfer in occupationally embedded tasks between dominant and non-dominant hands. [Subjects] Twelve neurologically intact participants were recruited. [Methods] The participants were divided into two training groups and performed training with their dominant or non-dominant hand.

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[Purpose] The purpose of this study was to assess the correlation of gait parameters with fear of falling in stroke survivors. [Subjects] In total, 12 patients with stroke participated. [Methods] The subjects performed on a Biodex Gait Trainer 2 for 5 min to evaluate characteristic gait parameters.

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Background: Stroke patients have major problems with impaired upper-extremity function. Unfortunately, many patients do not experience a full recovery from movement deficits in the upper extremities.

Objectives: The purpose of this study was to compare the effectiveness of inter-limb learning transfer (ILT) to the contralateral upper limb after both hemisphere-specific and -unspecific ipsilateral upper limb training for stroke patients with hemiparesis.

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[Purpose] This study proposed a new neck support tying (NST) method using Thera-Band for the prevention of neck and shoulder pain in workers doing overhead work. The purpose of this study was to investigate the effect of the new NST method using Thera-Band on cervical ROM and shoulder pain after overhead work. [Subjects] Fourteen male subjects were recruited.

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Background: Therapeutic concept of interlimb transfer provides very important information relevant to patients with stroke because it can be applied to help these patients recover movement skills disrupted following unilateral damage to the brain.

Objectives: The purpose of this study was to determine the transfer effects for both specialized training in each hemisphere and reversed training of a specialized task.

Methods: Twenty patients (ten women and ten men) with stroke and hemiparesis participated.

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Objective: The purpose of this study was to detect any differences in electromyographic (EMG) activity in the neck and shoulder muscles while performing simulated orchard work with and without neck support.

Participants: Fourteen healthy orchard harvesters (eight men and six women) who had no functional disorder of the neck or upper limbs and had never received orthopedic surgery were recruited.

Methods: A repeated-measures design was used.

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This study was performed to determine the changes in electromyographic activities in the shoulder and forearm muscles when using the bare hands, well-fitting gloves, and gloves that are one size smaller or one size larger for simulated assembly operations. Sixteen asymptomatic seated workers with normal hands and no obvious deformities, skin diseases, or allergies were recruited. The subjects were asked to simulate assembly operations using their bare hands, well-fitting gloves, and one size smaller or one size larger.

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Studies of strengthening and physical conditioning rehabilitation programs on stroke survivors have shown an increase in their physical function and quality of life (QOL). In this study the effectiveness of two exercise regimens was assessed: 1) a 24-week multidisciplinary supervised exercise program and 2) a 24-week self-monitored conditioning exercise program. Twenty-eight subjects (17 men and 11 women) were allocated to take part in either a multidisciplinary supervised program or a self-monitored exercise program.

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Objective: This study examined the effects of wearing a tight necktie on cervical range of motion and upper trapezius muscle activity.

Methods And Participants: Thirty computer workers were recruited. First, the active cervical ROM of the participants while wearing or not wearing a tight necktie was measured using the CROM instrument.

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The purpose of this study was to observe changes in electromyographic activity appeared in shoulder and scapular muscles when one wears no wrist extension orthosis, short wrist extension orthosis and long wrist extension orthosis when performing two model assembling operations. The study subjects were 16 adults who use right hand and did not have any functional disorder on their wrist or the upper limbs without any orthopedic surgery. The study subjects were asked to do the two model assembling operations without wrist extension orthosis, with a short wrist extension orthosis and with a long wrist extension orthosis.

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