Ergonomic evaluation of the effects of forearm conditions and body postures on trapezius muscle activity during smartphone texting

Ahmed, 2019, Impact of nomophobia A nondrug addiction among students of physiotherapy course using an online cross-sectional survey, Indian J. Psychiatr., 61, 77 Al-Qaisi, 2015, Electromyography analysis: comparison of maximum voluntary contraction methods for anterior deltoid and trapezius muscles, Procedia Manuf, 3, 4578, 10.1016/j.promfg.2015.07.475 Andersen, 2003, Risk factors in the onset of neck/shoulder pain in a prospective study of workers in industrial and service companies, Occup. Environ. Med., 60, 649, 10.1136/oem.60.9.649 Berolo, 2011, Musculoskeletal symptoms among mobile hand-held device users and their relationship to device use: a preliminary study in a Canadian university population, Appl. Ergon., 42, 371, 10.1016/j.apergo.2010.08.010 Bohannon, 1997, Comfortable and maximum walking speed of adults aged 20-79 years: reference values and determinants, Age Ageing, 26, 15, 10.1093/ageing/26.1.15 Cameron, 1996, Assessing work-related body-part discomfort: current strategies and a behaviorally oriented assessment tool, Int. J. Ind. Ergon., 18, 389, 10.1016/0169-8141(95)00101-8 Caneiro, 2010, The influence of different sitting postures on head/neck posture and muscle activity, Man. Ther., 15, 54, 10.1016/j.math.2009.06.002 Carlsson, 1983, Aspects of the reliability and validity of the visual analogue scale, Pain, 16, 87, 10.1016/0304-3959(83)90088-X Cook, 2004, The effect of upper extremity support on upper extremity posture and muscle activity during keyboard use, Appl. Ergon., 35, 285, 10.1016/j.apergo.2003.12.005 Cote, 2010, Update on the relation between pain and movement: consequences for clinical practice, Clin. J. Pain, 26, 754, 10.1097/AJP.0b013e3181e0174f De Luca, 1997, The use of surface electromyography in biomechanics, J. Appl. Biomech., 135, 10.1123/jab.13.2.135 Delisle, 2006, Comparison of three computer office workstations offering forearm support: impact on upper limb posture and muscle activation, Ergonomics, 49, 139, 10.1080/10610270500450739 Fedorowich, 2015, The effect of walking while typing on neck/shoulder patterns, Eur. J. Appl. Physiol., 115, 1813, 10.1007/s00421-015-3163-3 Gustafsson, 2017, Texting on mobile phones and musculoskeletal disorders in young adults: a five-year cohort study, Appl. Ergon., 58, 208, 10.1016/j.apergo.2016.06.012 Hagen, 2011, Increasing prevalence of chronic musculoskeletal complaints. A large 11-year follow-up in the general population (HUNT 2 and 3), Pain Med., 12, 1657, 10.1111/j.1526-4637.2011.01240.x Han, 2019, Head flexion angle when web-browsing and texting using a smartphone while walking, Appl. Ergon., 81, 10.1016/j.apergo.2019.102884 Hong, 2000, Changes in gait patterns in 10-year-old boys with increasing loads when walking on a treadmill, Gait Posture, 11, 254, 10.1016/S0966-6362(00)00055-2 Jensen, 1996, Estimating maximal EMG amplitude for the trapezius muscle: on the optimization of experimental procedure and electrode placement for improved reliability and increased signal amplitude, J. Electromyogr. Kinesiol., 6, 51, 10.1016/1050-6411(94)00012-3 Kang, 2019, Effects of the computer desk level on the musculoskeletal discomfort of neck and upper extremities and EMG activities in patients with spinal cord injuries, Occup. Ther. Int., 10.1155/2019/3026150 Kashima, 2006, Relationship between head position and the muscle hardness of the masseter and trapezius muscles: a pilot study, Cranio, 24, 38, 10.1179/crn.2006.007 Kietrys, 2015, Mobile input device type, texting style and screen size influence upper extremity and trapezius muscle activity, and cervical posture while texting, Appl. Ergon., 50, 98, 10.1016/j.apergo.2015.03.003 Kim, 2012, Biomechanical analysis of a smartphone task with different postures, Korean J. Sport Biomech., 22, 253, 10.5103/KJSB.2012.22.2.253 Kim, 2012, Effects of the use of smartphones on pain and muscle fatigue in the upper extremity, J. Phys. Ther. Sci., 24, 1255, 10.1589/jpts.24.1255 Kim, 2016, Preventive effects of stretching and stabilization exercises on muscle fatigue in mobile phone users, J. Phys. Ther. Sci., 28, 2529, 10.1589/jpts.28.2529 Kim, 2016, The comparison of muscle activity according to various conditions during smartphone use in healthy adults, Phys. Ther. Rehabil. Sci., 5, 15, 10.14474/ptrs.2016.5.1.15 Lee, 2015, Head flexion angle while using a smartphone, Ergonomics, 58, 220, 10.1080/00140139.2014.967311 Luttmann, 1996, Electromyographical study on surgeons in urology. ii. determination of muscular fatigue, Ergonomics, 39, 298, 10.1080/00140139608964460 Lyu, 2015, The effects of forearm support on upper body for people in front of monitor: a meta-analysis, Arch. Environ. Occup. Health, 70, 243, 10.1080/19338244.2013.845138 Madeleine, 2009, Changes in the amount and structure of motor variability during a deboning process are associated with work experience and neck-shoulder discomfort, Appl. Ergon., 40, 887, 10.1016/j.apergo.2008.12.006 Nag, 2009, Influence of arm and wrist support on forearm and back muscle activity in computer keyboard operation, Appl. Ergon., 40, 286, 10.1016/j.apergo.2008.04.016 Namwongsa, 2019, Effect of neck flexion angles on neck muscle activity among smartphone users with and without neck pain, Ergonomics, 1–10 Namwongsa, 2018, Ergonomic risk assessment of smartphone users using the Rapid Upper Limb Assessment (RULA) tool, PloS One, 13, 1, 10.1371/journal.pone.0203394 Ng, 2014, Neck and shoulder muscle activity during standardized work-related postural tasks, Appl. Ergon., 45, 556, 10.1016/j.apergo.2013.07.012 Ng, 1997, Electromyographic amplitude and frequency changes in the iliocostalis lumborum and multifidus muscles during a trunk holding test, Phys. Ther., 77, 954, 10.1093/ptj/77.9.954 Ning, 2015, Neck kinematics and muscle activity during mobile device operations, Int. J. Ind. Ergon., 48, 10, 10.1016/j.ergon.2015.03.003 Nordander, 2016, Exposure-response relationships for work-related neck and shoulder musculoskeletal disorders - analyses of pooled uniform data sets, Appl. Ergon., 55, 70, 10.1016/j.apergo.2016.01.010 Pope-Ford, 2015, Neck and shoulder muscle activation patterns among dentists during common dental procedures, Work, 51, 391, 10.3233/WOR-141883 Potvin, 1997, Effects of muscle kinematics on surface EMG amplitude and frequency during fatiguing dynamic contractions, J. Appl. Physiol., 82, 144, 10.1152/jappl.1997.82.1.144 Syamala, 2018, Armrests and back support reduced biomechanical loading in the neck and upper extremities during mobile phone use, Appl. Ergon., 73, 48, 10.1016/j.apergo.2018.06.003 Tomatis, 2012, Evidence for repetitive load in the trapezius muscle during a tapping task, Eur. J. Appl. Physiol., 112, 3053, 10.1007/s00421-011-2290-8 Uthaikhup, 2016, Decreased thickness of the lower trapezius muscle in patients with unilateral neck pain, Muscle Nerve, 54, 439, 10.1002/mus.25014 Wall, 2019, Associations between low back muscle activity, pelvic movement and low back discomfort development during prolonged standing – an exploratory laboratory study, Int. J. Ind. Ergon., 72, 380, 10.1016/j.ergon.2019.07.001 Xie, 2017, Prevalence and risk factors associated with musculoskeletal complaints among users of mobile handheld devices: a systematic review, Appl. Ergon., 59, 132, 10.1016/j.apergo.2016.08.020 Xie, 2018, Spinal kinematics during smartphone texting – a comparison between young adults with and without chronic neck-shoulder pain, Appl. Ergon., 68, 160, 10.1016/j.apergo.2017.10.018 Zhu, 2012, Shoulder and neck muscle activities during typing with articulating forearm support at different heights, Ergonomics, 55, 1412, 10.1080/00140139.2012.709541