[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100633018":3},{"organization":4,"armGroups":7,"interventions":24,"overallOfficials":39,"centralContacts":44,"locations":49,"responsibleParty":63,"collaborators":30,"id":66,"slug":67,"hasResults":68,"nctId":69,"briefTitle":70,"officialTitle":71,"acronym":72,"eligibilityCriteria":73,"healthyVolunteers":74,"sex":75,"minAge":76,"maxAge":77,"enrollmentInfo":78,"targetDuration":30,"studyType":81,"phases":82,"briefSummary":84,"conditions":85,"keywords":88,"overallStatus":100,"whyStopped":30,"lastUpdateSubmitDate":101,"lastUpdatePostDateStruct":102,"startDateStruct":105,"completionDateStruct":107,"leadSponsor":109,"locationsCount":110},{"fullName":5,"class":6},"Acibadem University","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"80 Hz Local Vibration","EXPERIMENTAL","Smartphone-delivered local vibration at 80 Hz applied to the dominant hand. Stimulation protocol: 5 repetitions of 45 seconds vibration + 15 seconds rest (total approximately 5 minutes). Represents the lower end of the tested frequency range.",[13],"Device: Smartphone Local Vibration at 80 Hz",{"label":15,"type":10,"description":16,"interventionNames":17},"150 Hz Local Vibration","Smartphone-delivered local vibration at 150 Hz applied to the dominant hand. Stimulation protocol: 5 repetitions of 45 seconds vibration + 15 seconds rest (total approximately 5 minutes). Represents the middle of the tested frequency range.",[18],"Device: Smartphone Local Vibration at 150 Hz",{"label":20,"type":10,"description":21,"interventionNames":22},"220 Hz Local Vibration","Smartphone-delivered local vibration at 220 Hz applied to the dominant hand. Stimulation protocol: 5 repetitions of 45 seconds vibration + 15 seconds rest (total approximately 5 minutes). Represents the upper end of the tested frequency range.",[23],"Device: Smartphone Local Vibration at 220 Hz",[25,31,35],{"type":26,"name":27,"description":28,"armGroupLabels":29,"otherNames":30},"DEVICE","Smartphone Local Vibration at 80 Hz","Local vibration delivered via a custom-developed iPhone application using the device haptic motor at 80 Hz. Participant seated with back support, shoulder neutral, elbow 90 degrees flexion, forearm neutral on table support, wrist relaxed. Phone held naturally in dominant hand palm. Five repetitions of 45 seconds vibration + 15 seconds rest. Participants instructed not to consciously squeeze during application.",[9],null,{"type":26,"name":32,"description":33,"armGroupLabels":34,"otherNames":30},"Smartphone Local Vibration at 150 Hz","Local vibration delivered via a custom-developed iPhone application using the device haptic motor at 150 Hz. Same positioning and protocol as 80 Hz condition. Five repetitions of 45 seconds vibration + 15 seconds rest.",[15],{"type":26,"name":36,"description":37,"armGroupLabels":38,"otherNames":30},"Smartphone Local Vibration at 220 Hz","Local vibration delivered via a custom-developed iPhone application using the device haptic motor at 220 Hz. Same positioning and protocol as 80 Hz condition. Five repetitions of 45 seconds vibration + 15 seconds rest.",[20],[40],{"name":41,"affiliation":42,"role":43},"Ali Omer Acar","Acibadem Mehmet Ali Aydinlar University, Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation","PRINCIPAL_INVESTIGATOR",[45],{"name":41,"role":46,"phone":47,"phoneExt":30,"email":48},"CONTACT","+905378262790","aliomer.acar@acibadem.edu.tr",[50],{"facility":51,"status":30,"city":52,"state":30,"zip":30,"country":53,"countryCode":30,"cosmosGeoPoint":54,"geoPoint":59,"contacts":60},"Acibadem Mehmet Ali Aydinlar University, Department of Physiotherapy and Rehabilitation","Istanbul","Turkey (Türkiye)",{"type":55,"coordinates":56},"Point",[57,58],28.94966,41.01384,{"lat":58,"lon":57},[61,62],{"name":41,"role":46,"phone":47,"phoneExt":30,"email":48},{"name":41,"role":43,"phone":30,"phoneExt":30,"email":30},{"type":43,"investigatorFullName":64,"investigatorTitle":65,"investigatorAffiliation":5,"oldNameTitle":30,"oldOrganization":30},"Ali Ömer Acar","Lecturer, Department of Physiotherapy and Rehabilitation","100633018","acute-effects-of-smartphone-delivered-local-vibration-on-hand-sensorimotor-performance-100633018",false,"NCT07521228","Acute Effects of Smartphone-Delivered Local Vibration on Hand Sensorimotor Performance","Acute Effects of Smartphone-Delivered Local Vibration at Three Frequencies on Hand Grip Strength, Two-Point Discrimination, Pressure Pain Threshold, and Reaction Time in Healthy Young Adults: A Randomized Crossover Study","SmartVib","Inclusion Criteria:\n\n* Healthy university students aged 18-25 years\n* Willing to participate and provide written informed consent\n* Able to attend three separate measurement sessions\n\nExclusion Criteria:\n\n* Surgical intervention on the hand or wrist within the past 6 months\n* Serious upper extremity injury or trauma within the past 6 months\n* Diagnosis of carpal tunnel syndrome or peripheral nerve entrapment\n* Numbness, paresthesia, or sensory impairment in the hand or wrist\n* History of neurological disease (e.g., stroke, multiple sclerosis, peripheral neuropathy)\n* Active pain, infection, open wound, or dermatological condition at the measurement site\n* Reported hypersensitivity or intolerance to vibration\n* Pregnancy",true,"ALL","18 Years","25 Years",{"count":79,"type":80},20,"ESTIMATED","INTERVENTIONAL",[83],"NA","This study investigates the acute effects of smartphone-delivered local vibration on hand sensorimotor performance in healthy young adults. Using a custom-developed iPhone application, three vibration frequencies (80 Hz, 150 Hz, and 220 Hz) are applied to the dominant hand in a randomized crossover design with a minimum 48-hour washout between sessions.\n\nThe primary aim is to evaluate frequency-dependent dose-response effects on hand grip strength. Secondary aims include assessment of two-point discrimination (tactile spatial acuity), pressure pain threshold, and hand reaction time before and immediately after each vibration condition.\n\nThe study seeks to generate evidence on optimal application parameters for smartphone vibration as an accessible and portable local vibration source in clinical and educational settings.",[86,87],"Healthy Volunteers","Vibration; Adverse Effect",[89,90,91,92,93,94,95,96,97,98,99],"local vibration","smartphone vibration","haptic feedback","grip strength","two-point discrimination","pressure pain threshold","reaction time","sensorimotor performance","dose-response","crossover","hand function","NOT_YET_RECRUITING","2026-04-03",{"date":103,"type":104},"2026-04-09","ACTUAL",{"date":106,"type":80},"2026-04",{"date":108,"type":80},"2026-11",{"name":5,"class":6},1]