[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100593552":3},{"organization":4,"armGroups":7,"interventions":7,"overallOfficials":8,"centralContacts":12,"locations":21,"responsibleParty":35,"collaborators":7,"id":39,"slug":40,"hasResults":41,"nctId":42,"briefTitle":43,"officialTitle":43,"acronym":7,"eligibilityCriteria":44,"healthyVolunteers":45,"sex":46,"minAge":47,"maxAge":48,"enrollmentInfo":49,"targetDuration":7,"studyType":52,"phases":7,"briefSummary":53,"conditions":54,"keywords":56,"overallStatus":60,"whyStopped":7,"lastUpdateSubmitDate":61,"lastUpdatePostDateStruct":62,"startDateStruct":65,"completionDateStruct":67,"leadSponsor":69,"locationsCount":70},{"fullName":5,"class":6},"Hong Kong Metropolitan University","OTHER",null,[9],{"name":10,"affiliation":5,"role":11},"William Tsang","STUDY_DIRECTOR",[13,18],{"name":14,"role":15,"phone":16,"phoneExt":7,"email":17},"Yi On Mak, Bachelor of Physiotherapy","CONTACT","+85292328865","s1314212@live.hkmu.edu.hk",{"name":10,"role":15,"phone":19,"phoneExt":7,"email":20},"(852) 39708703","wntsang@hkmu.edu.hk",[22],{"facility":23,"status":7,"city":24,"state":7,"zip":7,"country":24,"countryCode":25,"cosmosGeoPoint":26,"geoPoint":31,"contacts":32},"Hong Kong Metropolitan University Jockey Club Institute of Healthcare","Hong Kong","HK",{"type":27,"coordinates":28},"Point",[29,30],114.17469,22.27832,{"lat":30,"lon":29},[33],{"name":34,"role":15,"phone":7,"phoneExt":7,"email":20},"William Wai Nam Tsang",{"type":36,"investigatorFullName":37,"investigatorTitle":38,"investigatorAffiliation":5,"oldNameTitle":7,"oldOrganization":7},"PRINCIPAL_INVESTIGATOR","LIU FANG","PHD student","100593552","recruitment-of-the-diaphragm-and-sternocleidomastoid-muscle-during-loaded-inspiration-on-varying-sitting-support-in-healthy-adults-100593552",false,"NCT07007923","Recruitment of the Diaphragm and Sternocleidomastoid Muscle During Loaded Inspiration on Varying Sitting Support in Healthy Adults","Inclusion Criteria:\n\n* aged 18-35 years - No recent thoracic surgery in the past 6 months\n* Absence in history of chronic respiratory illness\n* Able to breathe spontaneously\n* Conscious, able to follow instructions on the use of IMT device\n\nExclusion Criteria:\n\n* with known cardiovascular, pulmonary or musculoskeletal disorders that would limit their functional capacity (E.g. Asthma, COPD)\n* presence with respiratory symptoms over past 2 weeks\n* pregnancy\n* malignancy\n* presence of neurological disorders (e.g. ALS, stroke)\n* PCS\u002F MCS in SF-12 scores below 50\n* Findings in spirometry suggesting presence of obstructive or restrictive disorders",true,"ALL","18 Years","35 Years",{"count":50,"type":51},45,"ESTIMATED","OBSERVATIONAL","This is a cross-sectional obsessional study.\n\nThis study explores how different sitting conditions affect two important muscles-the diaphragm and the sternocleidomastoid (SCM)-work during breathing exercises. The diaphragm is the main muscle for breathing, while the SCM helps when taking deeper breaths. Understanding how these muscles interact while sitting under various conditions can help improve breathing training techniques.\n\nThe study's objectives are (1) to investigate the relationship between diaphragm thickness fraction with 4 different sitting conditions during loaded inspiration among healthy adults and (2) To investigate the relationship between SCM activity with 4 different sitting conditions during loaded inspiration among healthy adults.\n\nThis research will conduct healthy adults, who will be instructed to breathe against resistance provided by the IMT while sitting on four different conditions: a regular chair, a soft pad with feet on the ground, a soft pad with feet on two additional soft pads, and a single soft pad with both feet on one pad. By using ultrasound to measure how thick the diaphragm gets and surface electromyography (sEMG) to track SCM activity, the data will be gathered on how these muscles function under different conditions.\n\nThe goal is to find out if sitting on unstable surfaces, like soft pads, can enhance diaphragm use compared to a stable chair. These surfaces may change how effectively the diaphragm and SCM work together. This research could lead to better recommendations for inspiratory muscle training (IMT), which helps strengthen these muscles, especially for people with breathing difficulties.\n\nBy identifying how posture influences muscle recruitment during breathing exercises, hoping to contribute valuable insights that can improve rehabilitation programs for individuals with respiratory conditions.",[55],"Diaphragm",[57,58,59],"Diaphragmatic thickening fraction","Sternocleidomastoid muscles","inspiratory pressure","NOT_YET_RECRUITING","2025-06-03",{"date":63,"type":64},"2025-06-06","ACTUAL",{"date":66,"type":51},"2025-06-19",{"date":68,"type":51},"2026-04-20",{"name":5,"class":6},1]