Determining safe teaching board heights through electromyographic analysis of the shoulder muscles

Ojukwu, Chidiebele Petronilla; Nwankwo, Chidimma Amarachukwu; Okemuo, Adaora Justina; Chukwu, Sylvester Caesar; Uchenwoke, Chigozie Ikenna; Anekwu, Emelie Moris; Okafor, Chinelo Jennifer

doi:10.1016/j.jbmt.2020.08.006

Cited by 1 publication

(1 citation statement)

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“…Shoulder, neck, foot, upper back and lower back are the highly affected regions among the teachers due to various job-related risk factors like awkward postures, working hours, and types of shoes used (Alias et al, 2020 ; Damayanti et al, 2017 ; Ojukwu et al, 2018 ). The height of the writing board has an impact on the neck and shoulder muscles namely Sternocleidomastoid (SCM), Trapezius, and Deltoid among the teachers, resulting in muscle fatigue and trauma (Ojukwu et al, 2020 ; Petronilla et al, 2020 ; Shankar et al, 2021 ). The awkward posture adopted by teachers such as neck forward posture, elevated arm postures results in MSD (Kataria et al, 2020 ; Shankar et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Impact of digital boards on hand and neck muscle activity during online teaching process

Shankar

Naveenkumar²,

Nithyaprakash

et al. 2022

Educ Inf Technol

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Academicians across the globe due to Covid 19 shifted to online teaching as a mainstream method by replacing the chalk and talk method. The main objective of this study is to find the impact of different sizes of digital boards used for online teaching on muscle activity and muscle fatigue, and then results are compared with conventional writing. Initially, a questionnaire survey is conducted among 100 college professors about the issue they faced while using online teaching methods. Experimental analysis are then conducted using electromyography sensor (sEMG) among ten college professors and their muscle activity on the dominant hand and neck while writing on two commercially available digital boards namely Type 1 (small writing area) and Type 2 (large writing area). Four muscles namely Flexor carpi radialis, Extensor carpi radialis, Biceps brachii, and Sternocleidomastoid (SCM) are chosen for the study. The results are then compared with muscle activity while writing on conventional A4 sheets. Normalized root mean square (RMS) is used to assess the muscle activity and the trend line of MPF value is utilized to assess the muscle fatigue. The results show that SCM muscle has more muscle activation compared to other selected muscles followed by flexor carpi radialis. Subjective analysis is carried out using the Borg scale, which has reported that Type 2 digital board having larger working area was preferred by the participants as it reduces muscle fatigue.

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