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IRCT20251115068000N2 IRCT 2026-09-14 Yazd University Effect of Attentional Strategies on Dynamic Stability and Movement Smoothness in Older Adults With and Without Mild Cognitive Impairment Effects of Different Attentional Focus Strategies on Dynamic Stability and Movement Smoothness During Perturbed Gait: An Optimal Control–Based Analysis in Older Adults With and Without Mild Cognitive Impairment 2026-09-23 anticipated 38 Complete https://irct.ir/trial/93234 interventional Randomization: Not randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Blinding description: This study will be conducted with blinding at the level of participants and outcome assessors. Participants will not be informed of their own cognitive status or that of other participants, specifically whether they belong to the cognitively healthy older adults group or the mild cognitive impairment (MCI) group. Due to the nature of the study and the need to provide specific instructions for performing the different attentional conditions, blinding participants to the type of attentional condition is not possible. Outcome assessors and personnel responsible for data processing and analysis will also be blinded to the participants’ group status, and the data will be coded using unique identification codes for analysis. The principal investigator and the researcher responsible for conducting the experimental procedures will not be blinded to participants’ group status because access to this information is necessary for proper implementation of the study protocol. Therefore, blinding in this study will be applied to participants’ cognitive status and to outcome assessment and data analysis, whereas blinding of the principal investigator and the researcher conducting the experimental procedures is not feasible due to the nature of the study protocol. N/A Mild Cognitive Impairment. Intervention 1: Control group: Older adults without mild cognitive impairment; perturbation walking under baseline, internal, near external, and far external attentional conditions. Intervention 2: Intervention group: Older adults with mild cognitive impairment; the same task under the four attentional conditions. No - There is not a plan to make this available Justification or reason for not sharing IPD is Data related to the study protocol and statistical analysis plan may be available from the corresponding author upon reasonable request after publication of the study results. Individual participant data, informed consent forms, and identifiable information will not be publicly shared to protect participant confidentiality.
public Mostafa Haj Lotfalian
Safaeie, Yazd university
Yazd Iran (Islamic Republic of) ۸۹۱۵۸۱۸۴۱۱ +98 35 3123 3385 M.HAJLOTFALIAN@YAZD.AC.IR Yazd University scientific Mostafa Haj Lotfalian
Safaeie, Yazd university
Yazd Iran (Islamic Republic of) ۸۹۱۵۸۱۸۴۱۱ +98 35 3123 3385 M.HAJLOTFALIAN@YAZD.AC.IR Yazd University Iran (Islamic Republic of) Age 60–80 years, ability to walk independently without an assistive device, absence of acute neurological, musculoskeletal, or other conditions that may affect walking or balance, and provision of written informed consent to participate in the study. For older adults with mild cognitive impairment, confirmation of mild cognitive impairment based on the cognitive assessment criteria specified in the study protocol is also required. 60 years 80 years Female History of severe neurological, musculoskeletal, or other disorders affecting walking or balance; severe visual or hearing impairment; inability to walk independently without an assistive device; history of a severe fall within the previous six months; or failure to meet the required cognitive criteria for assignment to the respective study group. F06.7 Mild cognitive disorder Behavior Behavior Control group: Older adults without mild cognitive impairment; perturbation walking under baseline, internal, near external, and far external attentional conditions. Intervention group: Older adults with mild cognitive impairment; the same task under the four attentional conditions. Dynamic stability based on the distance between the extrapolated center of mass and the base of support. Timepoint: During all four attentional conditions in a single testing session. Method of measurement: Calculated using the Margin of Stability from movement data and the position of the center of mass and base of support. Movement smoothness based on linear and angular jerk. Timepoint: During all four attentional conditions in a single testing session. Method of measurement: Calculated from linear and angular jerk derived from the recorded kinematic data during walking. Yazd University Approved 2026-08-15 Research Ethics Committees of Tehran University - Faculty of Sport Sciences and Health North Kargar Street, 15th Street, University of Tehran Tehran Tehran Iran (Islamic Republic of)