Cruz-Montecinos, CarlosCuesta-Vargas, AntonioMuñoz, CristianFlores, DanteEllsworth, JosephDe la Fuente, CarlosCalatayud, JoaquínRivera-Lillo, GonzaloSoto-Arellano, VerónicaTapia, ClaudioGarcía-Massó, Xavier2022-08-042022-08-042020-05-01Cruz-Montecinos C, Cuesta-Vargas A, Muñoz C, Flores D, Ellsworth J, De la Fuente C, et al. Impact of Visual Biofeedback of Trunk Sway Smoothness on Motor Learning during Unipedal Stance. Sensors. 2020 May 1;20(9):2585http://hdl.handle.net/10668/3876The assessment of trunk sway smoothness using an accelerometer sensor embedded in a smartphone could be a biomarker for tracking motor learning. This study aimed to determine the reliability of trunk sway smoothness and the effect of visual biofeedback of sway smoothness on motor learning in healthy people during unipedal stance training using an iPhone 5 measurement system. In the first experiment, trunk sway smoothness in the reliability group (n = 11) was assessed on two days, separated by one week. In the second, the biofeedback group (n = 12) and no-biofeedback group (n = 12) were compared during 7 days of unipedal stance test training and one more day of retention (without biofeedback). The intraclass correlation coefficient score 0.98 (0.93-0.99) showed that this method has excellent test-retest reliability. Based on the power law of practice, the biofeedback group showed greater improvement during training days (p = 0.003). Two-way mixed analysis of variance indicates a significant difference between groups (p < 0.001) and between days (p < 0.001), as well as significant interaction (p < 0.001). Post hoc analysis shows better performance in the biofeedback group from training days 2 and 7, as well as on the retention day (p < 0.001). Motor learning objectification through visual biofeedback of trunk sway smoothness enhances postural control learning and is useful and reliable for assessing motor learning.enAtribución 4.0 Internacionalhttp://creativecommons.org/licenses/by/4.0/Motor learningBiofeedbackPostural balanceInertial measurement unitSmartPhoneBiorretroalimentación psicológicaEquilibrio posturalTeléfono inteligenteMedical Subject Headings::Persons::Persons::Age Groups::AdultMedical Subject Headings::Phenomena and Processes::Physical Phenomena::Mechanical Phenomena::Biomechanical PhenomenaMedical Subject Headings::Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::HumansMedical Subject Headings::Check Tags::MaleMedical Subject Headings::Phenomena and Processes::Musculoskeletal and Neural Physiological Phenomena::Musculoskeletal Physiological Phenomena::Postural BalanceMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Evaluation Studies as Topic::Reproducibility of ResultsMedical Subject Headings::Persons::Persons::Age Groups::Adult::Young AdultMedical Subject Headings::Psychiatry and Psychology::Psychological Phenomena and Processes::Psychophysiology::Biofeedback, PsychologyMedical Subject Headings::Anatomy::Body Regions::TorsoMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::AccelerometryMedical Subject Headings::Chemicals and Drugs::Biological Factors::Biological Markersresearch article32370050Acceso abierto10.3390/s200925851424-8220PMC7248825