Posture and Texting: Effect on Balance in Young Adults

Nurwulan, Nurul Retno; Jiang, Bernard C.; Iridiastadi, Hardianto

doi:10.1371/journal.pone.0134230

Cited by 30 publications

(37 citation statements)

References 27 publications

(50 reference statements)

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“…The studies that evaluated static postural stability used various entropy methods, such as Shannon entropy [9,62], Renyi entropy [9,62], approximate entropy [47,51,54,62], sample entropy [51,54,55,62,63], multiscale entropy [48][49][50]53,[56][57][58][59]61,62,65], composite multiscale entropy [62], and multivariate multiscale entropy [15,56], in order to find a better approach to evaluate human posture. The findings of the previous studies comparing entropy and traditional COP methods suggested that the entropy approach is more sensitive in characterizing sway [59] and gives higher reliability [55].…”

Section: Comparison Between Entropy Methods and Traditional Copmentioning

confidence: 99%

“…Nurwulan et al used the entropy-based method along with the COP method to measure the effect of mobile phones on the static posture. To evaluate the effect on the dynamic posture, they compared the reaching distances with and without a secondary task [15].…”

Section: Primary Task Performancementioning

confidence: 99%

“…Quiet standing is the most common postural task in the postural stability studies [9,15,[47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. The other static postural tasks, such as the single-leg stance [59,63], tandem stance [15], and standing on a sway support [52,55,60], were used to evaluate the performance of the perturbed balance task. Only a few studies used the dynamic postural stability, such as walking [61,64].…”

Section: Previous Studies Based On the Postural Tasksmentioning

confidence: 99%

See 2 more Smart Citations

Possibility of Using Entropy Method to Evaluate the Distracting Effect of Mobile Phones on Pedestrians

Nurwulan

Jiang

2016

Entropy

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Abstract:The number of mobile phone users keeps increasing every year and mobile phones have become a primary need for most people. Ordinarily, people are not aware of the risk from a common dual-task study, such as using a mobile phone while walking or simply standing. This study reviewed the methodology in evaluating the distracting effect of mobile phones on pedestrians. A comprehensive review of literature revealed that the most common method in quantifying pedestrian performance is to evaluate postural task performance. Since using a mobile phone while crossing the road is a type of dual-task study, it would give more clarity to investigate it using entropy methods that have been proven more sensitive than the traditional center of pressure (COP) in discriminating the changes in human balance. The descriptions of commonly used entropy methods were also given in order to give a broad overview of the possibility in applying the methods to further clarify the distracting effect of mobile phones.

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Section: Comparison Between Entropy Methods and Traditional Copmentioning

confidence: 99%

Section: Primary Task Performancementioning

confidence: 99%

Section: Previous Studies Based On the Postural Tasksmentioning

confidence: 99%

See 1 more Smart Citation

Possibility of Using Entropy Method to Evaluate the Distracting Effect of Mobile Phones on Pedestrians

Nurwulan

Jiang

2016

Entropy

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“…Further, the SSI was developed to differentiate fallers and non-fallers. Conversely, the subjects in the current study were all healthy young adults with high adaptability to changes in the environment [3]. The performance accuracy could be higher if the acceleration data in all axes were considered and the subjects were not only healthy young adults [21].…”

Section: Resultsmentioning

confidence: 83%

“…Although this game is beneficial to encourage people to exercise, it is rather dangerous when people do not really pay attention to the road [1]. Mobile phone use during walking has a negative impact on working memory that increases perturbation that may cause accidents [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Decomposition Methods in Perturbed Walking

Nurwulan¹

2020

RIA

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Mobile phones cannot be separated from our daily lives. Most of young adults use their mobile phones while walking and this potentially cause accidents. The current study aimed to evaluate the performance of decomposition methods to detect perturbed walking. Ten young adults were asked to perform normal walking and walking while playing game on their phones. The vertical acceleration data were decomposed using 4, 6, and 8 levels of ensemble empirical mode decomposition (EEMD), discrete wavelet transform (DWT), and wavelet packet decomposition (WPD) before the calculation of the step stability index (SSI) to detect the perturbation during walking. Machine learning techniques were used to evaluate the performance of the decomposition methods. The evaluation results showed that DWT with 6 levels of decomposition outperformed other decomposition methods. In conclusion, the DWT can be used to increase the sensitivity of the SSI method in detecting walking perturbation.

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Control of grip force and vertical posture while holding an object and being perturbed

2016

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We investigated motor control perspectives of coordinating maintenance of posture and application of grip force when holding an object and being perturbed. Ten subjects stood on the force platform holding an instrumented object in their dominant hand and were exposed to an external perturbation applied to their shoulders. Task demands were manipulated by positioning a slippery cap on top of the instrumented object. Grip force applied to the object, the object acceleration and the center of pressure (COP) were recorded and analyzed during the time intervals typical for the anticipatory (APA) and compensatory (CPA) components of postural control. Onsets of grip force were seen before the onsets of the COP displacement and initiation of movements of the handheld object during the APA phase of postural control, while the onsets of maximum grip force preceded the maximum COP displacement during the CPA phase. When the task demands increased by holding a handheld object with the slippery cap, subjects tended to generate grip force earlier and of a smaller magnitude; also, the COP displacement in the APA phase was smaller as compared to holding a handheld object only. The outcome provides a foundation for future studies of maintenance of vertical posture in people with impairments of balance and grip force control when holding an object and being perturbed.

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Posture and Texting: Effect on Balance in Young Adults

Cited by 30 publications

References 27 publications

Possibility of Using Entropy Method to Evaluate the Distracting Effect of Mobile Phones on Pedestrians

Possibility of Using Entropy Method to Evaluate the Distracting Effect of Mobile Phones on Pedestrians

Performance Evaluation of Decomposition Methods in Perturbed Walking

Control of grip force and vertical posture while holding an object and being perturbed

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