Wyniki wyszukiwania - BazTech

1

Preliminary statistical analysis of anthropometrics data in related to sitting posture among college students at east coast Malaysia

Ibrahim M.H., Ishak N.F., Mukhtar N.Z., Basir M.H., Said N.A., Mohamed K.A., Awang M.E.

Archives of Materials Science and Engineering

|

2022

|

Vol. 116, nr 2

81--85

EN

Purpose: To statistically analyse sitting posture using anthropometrics data among college students in Malaysia. Design/methodology/approach: This study was conducted among 52 college students consisting of males and females. Data were analysed using a common statistical tool which is the Statistical Package of Sosial Science (SPSS). Findings: Preliminary analysis of data indicated that there are wider differences in standard deviation of eye sitting height compared to the previous study conducted. Research limitations/implications: This study was conducted at only one higher learning institution/college located at East Cost of Malaysia. Practical implications: The larger value of standard deviation discovered as statistical analysis performed using combined data among male and female participants suggested that data should be segregated. Originality/value: Result obtained could be used as a preliminary guideline to design any related item in related to sitting posture.

2

Respiratory chest movement measurement as a chair quality indicator – preliminary observations

Szczygieł E., Zielonka K., Mazur T., Mętel S., Golec J.

International Journal of Occupational Safety and Ergonomics

|

2015

|

Vol. 21, No. 2

207--212

EN

Regardless of the constantly increasing time man is spending in a sitting position, there is still a lack of objective chair quality assessment criteria. The aim of this paper is to find the answer to whether respiratory chest movement measurements can be a chair quality indicator. The study included 34 participants (mean 34.7 years ± 5.2). Their chest movements were assessed using respiratory inductive plethysmography while sitting on two subsequent chairs. Significant differences in chest movements depending on chair type were observed concerning the breathing duct (upper and lower) and breathing movement amplitude. The amplitude of the upper respiratory track in the first chair was higher (239.4 mV) compared with the second seat (207.3 mV) (p = .018). The analyzed parameters of respiratory chest movement may become a helpful indicator for design and selection of chairs which enable people to both work and relax in the most ergonomic conditions.

3

Przewlekła niewydolność żylna kończyn dolnych - schorzenie związane z rodzajem wykonywanej pracy

Łastowiecka-Moras E.

Bezpieczeństwo Pracy : nauka i praktyka

|

2015

|

nr 6

16-19

PL

Przewlekła niewydolność żylna (PNŻ) jest najczęściej występującym u ludzi zespołem chorobowym naczyń kończyn dolnych, wywołanym niewydolnością zastawek żylnych. Gdy zastawki są uszkodzone, krew cofa się i zaczyna napierać na ściany naczyń Naczynia poszerzają się i z biegiem lal zalegająca krew żylna wywołuje zmiany chorobowe w otaczających tkankach. Objawy choroby mogą mieć charakter zmian skórnych lub naczyniowych PNZ jest chorobą o etiologii wieloczynnikowej, a jednym z czynników mogących mieć wpływ na pojawienie się jej objawów jest charakter wykonywanej pracy. Długotrwała praca w pozycji stojącej lub siedzącej może prowadzić do zastoju krwi w naczyniach żylnych kończyn dolnych, dlatego należy odpowiednio zadbać o swoje stanowisko pracy. Dla osób pracujących w pozycji siedzącej poleca się krzesła z pochylonym oparciem i podnóżki pod stopy oraz regularne przerwy, w czasie których następuje zmiana pozycji ciała. Z kolei pracownikom wykonującym głównie pracę stojącą zaleca się częste przerwy na krótkotrwały spacer. Najlepszym sprzymierzeńcem w walce z PNZ, niezależnie od rodzaju wykonywanej pracy jest aktywność.

EN

Chronic venous insufficiency (CVI) is the most common human disorder of the lower limbs; it is by venous valvular insufficiency. When the valve does not close properly, blood backs up and begins to push against the walls of the blood vessels. Vessels extend and over the years residual venous blood causes lesions in the surrounding tissues. Symptoms of the disease may be cutaneus or vascular. CVI is a disease of multifactional etiology and the nature of work may be a factor that leads to symptoms of CVI Prolonged standing or sitting can lead to stagnation of blood in the veins of the lower limbs; therefore, workers doing this kind of work must take care of their workstation. For people working in a sitting posture, chairs with a sloping backrest and a footrest, and regular breaks are recommended. For workers working in a standing posture, short walks during frequent breaks are recommended. Physical activity is best in fighting against CVI, regardless of the type of work.

4

Sitting Posture, Postural Discomfort, and Visual Performance: A Critical View on the Interdependence of Cognitive and Anthropometric Factors in the VDU Workplace

Ziefle M.

International Journal of Occupational Safety and Ergonomics

|

2003

|

Vol. 9, No. 4

503--514

EN

The study focuses on individual and standard visual display unit (VDU) workplaces with respect to performance and muscular load. Three different work settings were realized: The workplace was either adjusted to individual preferences or to the European standard. The third condition mirrored exactly the individual setting, however participants were told that it was set according to another standard. Dependent variables were visual performance in a search task, the rated muscular load, and individual preferences. Results show that both individual work settings yielded a superior performance as compared to the standard. However, performance and muscular comfort improved when participants knew they had adjusted the workplace. Apparently, VDU users follow a intuitive rationale adjusting their work setting minimizing muscular load and optimizing performance.