Thumb motor performance varies with thumb and wrist posture during single-handed mobile phone use

Trudeau, Matthieu B.; Young, Justin G.; Jindrich, Devin L.; Dennerlein, Jack T.

doi:10.1016/j.jbiomech.2012.07.012

Cited by 75 publications

(83 citation statements)

References 16 publications

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“…Based on previous findings, we expected the interphalangeal (IP) joint of the thumb to be more extended for the two-handed grip (Trudeau et al, 2012b). However, we found that participants did not extend the IP joint during two-handed tapping.…”

Section: Discussionmentioning

confidence: 63%

“…Previous studies reporting thumb posture, thumb performance, and muscle activity during mobile device use have revealed that device design could affect both user performance and musculoskeletal strain (Jonsson et al, 2007(Jonsson et al, , 2011Karlson et al, 2008;Gustafsson et al, 2010;Hogg, 2010;Trudeau et al, 2012b). For right-handed users, tapping on the top right or bottom left of a touchscreen was associated with the greatest performance compared with other areas on the screen, as indicated by shorter transition times, better accuracy and fewer errors Han, 2010a, 2010b).…”

Section: Introductionmentioning

confidence: 99%

“…For right-handed users, tapping on the top right or bottom left of a touchscreen was associated with the greatest performance compared with other areas on the screen, as indicated by shorter transition times, better accuracy and fewer errors Han, 2010a, 2010b). Greater performance is associated with postures involving moderate thumb flexion or extension (Trudeau et al, 2012b), and small devices (Trudeau et al, 2012a).…”

Section: Introductionmentioning

confidence: 99%

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Two-handed grip on a mobile phone affords greater thumb motor performance, decreased variability, and a more extended thumb posture than a one-handed grip

et al. 2016

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Holding a mobile computing device with two hands may affect thumb motor performance, joint postures, and device stability compared to holding the device and tapping the touchscreen with the thumb of the holding hand. We tested the hypotheses that holding a touchscreen mobile phone with two hands lead to increased thumb motor performance, different thumb postures, and decreased device movement relative to using one hand. Ten right-handed participants completed reciprocal thumb tapping tasks between emulated keys on a smartphone in either a one- (portrait) or two-handed (landscape) grip configuration. Effective index of performance measured from Fitts' Law was 9% greater (p < 0.001), movement time 7% faster (p < 0.001), and taps were 4% more precise (p < 0.016) for the two-handed grip. Tapping with a two-handed grip involved significantly different wrist and thumb postures than a one-handed grip. Variability of the computing device's movement was 36-63% lower for the two-handed grip compared to the one-handed grip condition (p < 0.001). The support for our hypotheses suggests that a two-handed grip results in increased performance and more extended wrist and thumb postures than a single-handed grip. Device designs that allow two-handed grips may afford increased performance relative to a one-handed grip.

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Section: Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two-handed grip on a mobile phone affords greater thumb motor performance, decreased variability, and a more extended thumb posture than a one-handed grip

et al. 2016

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“…4). These studies demonstrated that the thumb often obtains nonneutral postures close to the limits of its joints' range of motion, associated with poor motor performance [40][41][42][43][44][45]. The thumb performed best when the postures were most neutral, such as with abduction and adduction of the thumb swiping over the surface of the phone similar to a windshield wiper [44,45].…”

Section: Mobile and Smart Phonesmentioning

confidence: 99%

The state of ergonomics for mobile computing technology

Dennerlein

2015

WOR

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Abstract. BACKGROUND:Because mobile computing technologies, such as notebook computers, smart mobile phones, and tablet computers afford users many different configurations through their intended mobility, there is concern about their effects on musculoskeletal pain and a need for usage recommendations. OBJECTIVE: Therefore the main goal of this paper to determine which best practices surrounding the use of mobile computing devices can be gleaned from current field and laboratory studies of mobile computing devices. METHODS: An expert review was completed. RESULTS: Field studies have documented various user configurations, which often include non-neutral postures, that users adopt when using mobile technology, along with some evidence suggesting that longer duration of use is associated with more discomfort. It is therefore prudent for users to take advantage of their mobility and not get stuck in any given posture for too long. The use of accessories such as appropriate cases or riser stands, as well as external keyboards and pointing devices, can also improve postures and comfort. CONCLUSIONS: Overall, the state of ergonomics for mobile technology is a work in progress and there are more research questions to be addressed.

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“…4 in addition, it has been reported that university students spend an average of >3.5 hours/day texting, emailing, scheduling and internet browsing on their mobile phones and are frequently said to have pain at the base of the thumb. 5 single hand-held smart phones, compels individuals to engage in repetitive flexion/extension of the wrist.…”

Section: Introduction:-mentioning

confidence: 99%

Influence of Smartphone Addiction on Grip and Pinch Strength in Collegiate Population – An Observational Study.

Motimath¹,

Luis²,

Chivate³

2017

IJAR

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Thumb motor performance varies with thumb and wrist posture during single-handed mobile phone use

Cited by 75 publications

References 16 publications

Two-handed grip on a mobile phone affords greater thumb motor performance, decreased variability, and a more extended thumb posture than a one-handed grip

Two-handed grip on a mobile phone affords greater thumb motor performance, decreased variability, and a more extended thumb posture than a one-handed grip

The state of ergonomics for mobile computing technology

Influence of Smartphone Addiction on Grip and Pinch Strength in Collegiate Population – An Observational Study.

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