Photographic measurement of head and cervical posture when viewing mobile phone: a pilot study

Guan, Xiaofei; Fan, Guoxin; Wu, Xiaodong; Zeng, Ying; Su, Hang; Gu, Guangfei; Zhou, Qi; Gu, Xin; Zhang, Hailong; He, Shisheng

doi:10.1007/s00586-015-4143-3

Cited by 70 publications

(62 citation statements)

References 26 publications

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“…Guan and Fan [87] used photogrammetry to study 186 Chinese adults and found that head tilt angle increased and neck tilt angle decreased significantly during mobile phone viewing. Straker and Burgess-Limerick [88] stated that an increase in cervical muscle activity is evident with lower display placement when using electronic products.…”

Section: Discussionmentioning

confidence: 99%

Smart Device Use and Perceived Physical and Psychosocial Outcomes among Hong Kong Adolescents

Kwok

Lee

2017

IJERPH

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Excessive electronic screen-based activities have been found to be associated with negative outcomes. The aim of this study was to investigate the prevalences and patterns of smart device activities and the purposes and perceived outcomes related to smart device use, and the differences in patterns of smart device activities between adolescents who did and did not perceive these outcomes. The study was a cross-sectional survey of Hong Kong primary and secondary school students. Demographic characteristics, purpose and pattern of the activities, and frequencies of the outcomes were measured. Data from 960 adolescents aged 10–19 were analyzed. Nearly 86% of the sample use smart device daily. The one-week prevalence of perceived sleep deprivation, eye discomfort, musculoskeletal discomfort, family conflict and cyberbullying victimization related to smart device use were nearly 50%, 45%, 40%, 20% and 5% respectively. More than 25% of the respondents were at risk of negative outcomes related to smart device activities for more than 1 h per day, browsing and gaming on at least 4 days per week and watching TV/movies and posting on more than 2 days per week. Their patterns of smart device activities may put a significant number of them at risk of negative outcomes.

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Section: Discussionmentioning

confidence: 99%

Smart Device Use and Perceived Physical and Psychosocial Outcomes among Hong Kong Adolescents

Kwok

Lee

2017

IJERPH

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“…Digital photography was applied to assess body posture of children carrying heavy backpacks [86], to evaluate the quality of posture while standing [87, 88] and siting [89], or for quantifying the foot shape [90]. Several studies described usefulness of the photographic technique to assess patients with idiopathic scoliosis [75, 91–94]. …”

Section: Discussionmentioning

confidence: 99%

Two-dimensional digital photography for child body posture evaluation: standardized technique, reliable parameters and normative data for age 7-10 years

et al. 2017

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BackgroundDigital photogrammetry provides measurements of body angles or distances which allow for quantitative posture assessment with or without the use of external markers. It is becoming an increasingly popular tool for the assessment of the musculoskeletal system. The aim of this paper is to present a structured method for the analysis of posture and its changes using a standardized digital photography technique.Material and methodsThe purpose of the study was twofold. The first one comprised 91 children (44 girls and 47 boys) aged 7–10 (8.2 ± 1.0), i.e., students of primary school, and its aim was to develop the photographic method, choose the quantitative parameters, and determine the intraobserver reliability (repeatability) along with the interobserver reliability (reproducibility) measurements in sagittal plane using digital photography, as well as to compare the Rippstein plurimeter and digital photography measurements. The second one involved 7782 children (3804 girls, 3978 boys) aged 7–10 (8.4 ± 0.5), who underwent digital photography postural screening. The methods consisted in measuring and calculating selected parameters, establishing the normal ranges of photographic parameters, presenting percentile charts, as well as noticing common pitfalls and possible sources of errors in digital photography.ResultsA standardized procedure for the photographic evaluation of child body posture was presented. The photographic measurements revealed very good intra- and inter-rater reliability regarding the five sagittal parameters and good reliability performed against Rippstein plurimeter measurements. The parameters displayed insignificant variability over time. Normative data were calculated based on photographic assessment, while the percentile charts were provided to serve as reference values. The technical errors observed during photogrammetry are carefully discussed in this article.ConclusionsTechnical developments are allowed for the regular use of digital photogrammetry in body posture assessment. Specific child positioning (described above) enables us to avoid incidentally modified posture. Image registration is simple, quick, harmless, and cost-effective. The semi-automatic image analysis, together with the normal values and percentile charts, makes the technique reliable in terms of child’s posture documentation and corrective therapy effects’ monitoring.Electronic supplementary materialThe online version of this article (10.1186/s13013-017-0146-7) contains supplementary material, which is available to authorized users.

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“…This method makes use of the neck angle measured from a side view photo of a person. This method has been proven to be reliable ; therefore, in this paper, we used this method to validate the neck angle calculated from our smartphone monitoring system.…”

Section: Experiments and Demonstrationmentioning

confidence: 99%

“…Then, the system uses these two attributes, namely the tilt angle and the face angle, to calculate the neck angle based on the proposed neck angle calculation formula. Later in this paper, we evaluate the proposed algorithm and formula by conducting an experiment on 30 human subjects to compare the neck angle from our proposed smartphone‐based system with the previously published photogrammetric method . The evaluation was done using a statistical analysis to calculate the mean differences in the results from these two methods.…”

Section: Introductionmentioning

confidence: 99%

Neck posture monitoring system based on image detection and smartphone sensors using the prolonged usage classification concept

Lawanont

Inoue

Mongkolnam

et al. 2018

IEEJ Transactions Elec Engng

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Since the beginning of the smartphone era, the number of smartphone users has increased dramatically. Consequently, several aspects of their use have provoked concerns from researchers. From a health-related perspective, text neck syndrome is a consequence of excessive smartphone use. Therefore, we introduce a neck posture monitoring system to help prevent text neck syndrome in smartphone users. The system operates on smartphones using the embedded rotation vector sensors and the camera for image detection. Data from the sensors and camera are used to calculate the neck angle. The results of an experiment show that the calculation algorithm is not significantly different from the photogrammetric method, which was proposed earlier as a method to measure the neck angle from a side view image. In summary, we propose a system that includes the detection and classification of the user's neck posture to raise awareness and help promote better posture to prevent text neck syndrome among smartphone users.

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Photographic measurement of head and cervical posture when viewing mobile phone: a pilot study

Cited by 70 publications

References 26 publications

Smart Device Use and Perceived Physical and Psychosocial Outcomes among Hong Kong Adolescents

Smart Device Use and Perceived Physical and Psychosocial Outcomes among Hong Kong Adolescents

Two-dimensional digital photography for child body posture evaluation: standardized technique, reliable parameters and normative data for age 7-10 years

Neck posture monitoring system based on image detection and smartphone sensors using the prolonged usage classification concept

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