A comparison of posture and muscle activity means and variation amongst young children, older children and young adults whilst working with computers.

Children and young adults are the most frequent users of computers. Whilst guidelines for adults have been based on research, available guidelines for children have had to assume children and adults are similar due to limited research evidence derived specifically from children. This study aimed to compare the posture and muscle activity of children with young adults. Thirty six adults aged 18-25 years, 24 children aged 10-12 years and 18 children aged 5-6 years participated in a series of laboratory studies. Upper body postures were measured using a 3D motion analysis system. Muscle activity of bilateral cervical erector spinae and upper trapezius muscles was assessed. Mean and variation were examined, the latter using both amplitude range and Exposure Variation Analysis matrix standard deviation. Mean postures assumed by children tended to show more spinal flexion and spinal asymmetry than adults. However children also tended to show more variation in posture and muscle activity. These findings suggest that whilst there may be differences in how children and adults use computers, basic principles of encouraging appropriate postures and variation should apply for both children and adults.

[1]  L. Straker,et al.  The impact of computer display height and desk design on muscle activity during information technology work by young adults. , 2008, Journal of Electromyography & Kinesiology.

[2]  L Straker,et al.  The influence of desk and display design on posture and muscle activity variability whilst performing information technology tasks. , 2009, Applied ergonomics.

[3]  Alan Hedge,et al.  An anthropometric and postural risk assessment of children's school computer work environments , 1999 .

[4]  L M Straker,et al.  The association between information and communication technology exposure and physical activity, musculoskeletal and visual symptoms and socio-economic status in 5-year-olds. , 2006, Child: care, health and development.

[5]  T. Läubli,et al.  Continuous, intermitted and sporadic motor unit activity in the trapezius muscle during prolonged computer work. , 2003, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[6]  Leon Straker,et al.  Upper quadrant postural changes of school children in response to interaction with different information technologies , 2004, Ergonomics.

[7]  Leon Straker,et al.  Survey of physical ergonomics issues associated with school childrens’ use of laptop computers , 2000 .

[8]  Carolyn M. Sommerich,et al.  A survey of high school students with ubiquitous access to tablet PCs , 2007, Ergonomics.

[9]  Robin J. Burgess-Limerick,et al.  Visual Display Height , 2000, Hum. Factors.

[10]  L Straker,et al.  The impact of computer display height and desk design on 3D posture during information technology work by young adults. , 2008, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[11]  L M Straker,et al.  Physical and psychosocial aspects of the learning environment in information technology rich classrooms , 2001, Ergonomics.

[12]  J. V. Dijk,et al.  The Digital Divide in Europe , 2007 .

[13]  V. Rideout,et al.  Zero to Six: Electronic Media in the Lives of Infants, Toddlers and Preschoolers , 2003 .

[14]  Alan Hedge,et al.  The Effect of Computer Workstation Design on Student Posture , 1998 .

[15]  A. Rimpelä,et al.  Frequent computer-related activities increase the risk of neck-shoulder and low back pain in adolescents. , 2006, European journal of public health.

[16]  Christine A. James,et al.  Children's computer usage: are they at risk of developing repetitive strain injury? , 2005, Work.

[17]  Carolyn M. Sommerich,et al.  Effects of Computer Monitor Viewing Angle and Related Factors on Strain, Performance, and Preference Outcomes , 2001, Hum. Factors.

[18]  Susumu Saito,et al.  An ergonomic questionnaire survey on the use of computers in schools. , 2002, Industrial health.

[19]  Leon Straker,et al.  Cervical erector spinae and upper trapezius muscle activity in children using different information technologies , 2005 .

[20]  Leon Straker,et al.  Children's Posture and Muscle Activity at Different Computer Display Heights and During Paper Information Technology Use , 2008, Hum. Factors.

[21]  L M Straker,et al.  A comparison of posture and muscle activity during tablet computer, desktop computer and paper use by young children , 2008, Ergonomics.

[22]  J P Psihogios,et al.  A field evaluation of monitor placement effects in VDT users. , 2001, Applied ergonomics.

[23]  S. Dockrell,et al.  An investigation of children's posture and discomfort during computer use , 2007, Ergonomics.

[24]  Leon Straker,et al.  The effect of individually adjusted workstations on upper quadrant posture and muscle activity in school children. , 2002, Work.