Texting with touchscreen and keypad phones - A comparison of thumb kinematics, upper limb muscle activity, exertion, discomfort, and performance

Gustafsson, Ewa, 1955 (author): Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa, enheten för arbets-och miljömedicin,Institute of Medicine, Department of Public Health and Community Medicine, Section of Occupational and environmental medicine

Coenen, P. (author)

Campbell, A. (author)

Straker, L. (author)

(creator_code:org_t)

Related links:: https://doi.org/10.1...; show more...; https://gup.ub.gu.se...; https://doi.org/10.1...; show less...

Abstract Subject headings

This study aimed to compare thumb kinematics and upper limb muscle activity, and the influence of hand size, when texting on a keypad smartphone and a touchscreen smartphone. Furthermore, the study compared exertion, discomfort, and performance when texting on the two phones. The thumb kinematics were tracked using a 3D motion analysis system and muscle activity was registered in six upper limb muscles using surface electromyography in 19 participants. When texting on the touchscreen phone compared to the keypad phone thumb flexion (p = 0.008) and flexion/extension range of motion were smaller (p = 0.02), the thumb was on average less internally rotated (p = 0.02), and activity (50th and 90th percentile) of the thumb and forearm muscles was lower (p ≤ 0.05). The differences in thumb flexion were found only in the group with shorter hands and the differences in muscle activity was found only in the group with longer hands. These findings suggest there are differences in risks for developing musculoskeletal disorders during smartphone use with different key activation mechanisms and different hand sizes. © 2018 The Authors

TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk ergonomi (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Ergonomics (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Arbetsmedicin och miljömedicin (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Occupational Health and Environmental Health (hsv//eng)

By the author/editor: Gustafsson, Ewa, ...; Coenen, P.; Campbell, A.; Straker, L.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Medical Ergonomi ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Occupational Hea ...

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