Influence of smartphone use on the median frequency of mastigatory and trapezius muscles in women - a Pilot study |
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| Affiliation: | 1. Pos Graduate Program in Human Movement Sciences, Methodist University of Piracicaba - UNIMEP, Piracicaba, SP, Brazil;2. Graduate in Physical Therapy in Methodist University of Piracicaba, UNIMEP, Piraciacaba, SP, Brazil;1. Musculoskeletal Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran;2. Student Research Committee, Ahvaz Jundishapur Univesity of Medical Sciences, Ahvaz, Iran;3. Musculoskeletal Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran;4. Student Research Committee, Rehabilitation School, Isfahan University of Medical Sciences, Isfahan, Iran;5. Musculoskeletal Research Center, Instructor at Isfahan University of Medical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran;1. SCM Kinéquipe, 15 Rue Lacuzon, 39200, St Claude, France;2. IFMK de Lyon (University of Physiotherapy), 8, Avenue Rockefeller, 69008, Lyon, France;3. Le Gitalet, Route de La Vie Neuve, 39310, Septmoncel, France;1. Centre de Réadaptation Marie Enfant, Centre de Recherche du CHU Sainte Justine, Montréal, Canada;2. ToNIC Toulouse Neuroimaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France;3. Département de Danse, Université du Québec à Montréal, Montréal, Canada;4. Département des Sciences de l’Activité Physique, Université du Québec à Montréal, Montréal, Canada;5. Shriners Hospital for Children, Montréal, Canada;6. École de Kinésiologie et des Sciences de l''activité Physique, Université de Montréal, Montréal, Canada;1. Department of Physical Therapy, Federal University of Pernambuco, Recife, Brazil;2. Department of Statistics, Federal University of Pernambuco, Recife, Brazil |
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| Abstract: | IntroductionThe use of smartphones is growing every year, and their excessive use can cause adverse physical and mental effects.AimThis study aimed to evaluate the influence of smartphone use on the median frequency of the masticatory muscles and upper trapezius muscles in healthy women.MethodSix healthy young women were evaluated. All the volunteers underwent a submaximal bite test to evaluate their masticatory muscles. In addition, the volunteers underwent a test for bilateral shoulder elevation to a submaximal load to evaluate their upper trapezius muscles. Both protocols were performed before and after a task using the smartphone for 30 min. Median frequency (MF) values were collected during the submaximal bite and submaximal shoulder elevation tests.ResultsData were analyzed using specific statistical tests. A statistically significant reduction in the MF for all the masticatory muscles was observed in the bilateral bite task when comparing pre and post smartphone use (p < 0.005). A significant reduction in the MF was also found for the right upper trapezius when comparing pre and post smartphone use in the shoulder elevation task (p = 0.001).ConclusionIt appears that prolonged smartphone use may contribute to fatigue in the masticatory and upper trapezius muscles. Therefore, guidelines for smartphone users should include advice on the moderate use of this device. |
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| Keywords: | Smartphone Electromyography Muscle fatigue |
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