[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100637739":3},{"organization":4,"armGroups":7,"interventions":19,"overallOfficials":25,"centralContacts":30,"locations":40,"responsibleParty":53,"collaborators":18,"id":57,"slug":58,"hasResults":59,"nctId":60,"briefTitle":61,"officialTitle":62,"acronym":63,"eligibilityCriteria":64,"healthyVolunteers":59,"sex":65,"minAge":66,"maxAge":67,"enrollmentInfo":68,"targetDuration":18,"studyType":71,"phases":72,"briefSummary":74,"conditions":75,"keywords":77,"overallStatus":43,"whyStopped":18,"lastUpdateSubmitDate":85,"lastUpdatePostDateStruct":86,"startDateStruct":89,"completionDateStruct":91,"leadSponsor":93,"locationsCount":94},{"fullName":5,"class":6},"Université Libre de Bruxelles","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"WB-HIIT Intervention","EXPERIMENTAL","A supervised whole-body high-intensity interval training (WB-HIIT) program performed in small groups. Participants complete 2 to 3 sessions per week for 10 weeks. Each session includes a warm-up followed by 8 to 12 whole-body exercises performed at high intensity for 20-60 seconds with recovery periods of 20-60 seconds. Progression is applied by adjusting exercise complexity, number of sets, and work-to-rest ratio. Heart rate and perceived exertion (Borg CR-10 scale) are monitored.",[13],"Behavioral: Whole-Body High-Intensity Interval Training (WB-HIIT)",{"label":15,"type":16,"description":17,"interventionNames":18},"Control Group","NO_INTERVENTION","Participants in the control group do not receive structured exercise training. They maintain their usual lifestyle and complete the same pre- and post-intervention assessments as the intervention group.",null,[20],{"type":21,"name":22,"description":23,"armGroupLabels":24,"otherNames":18},"BEHAVIORAL","Whole-Body High-Intensity Interval Training (WB-HIIT)","A structured WB-HIIT program using body-weight exercises such as squats, lunges, mountain climbers, and similar multi-joint movements. Sessions last 35-50 minutes and include 3 to 4 sets of interval blocks performed at high intensity. The training is supervised by qualified exercise professionals.",[9],[26],{"name":27,"affiliation":28,"role":29},"Malgorzata Klass, PhD; Prof.","Université libre de Bruxelles (ULB), Research Unit in Cardio-respiratory Physiology, Exercise & Nutrition","STUDY_DIRECTOR",[31,36],{"name":32,"role":33,"phone":34,"phoneExt":18,"email":35},"Julie Carpentier, PhD","CONTACT","+3225553859","julie.carpentier@ulb.be",{"name":37,"role":33,"phone":38,"phoneExt":18,"email":39},"Malgorzata Klass, PhD","+325553859","malgorzata.klass@ulb.be",[41],{"facility":42,"status":43,"city":44,"state":18,"zip":18,"country":45,"countryCode":46,"cosmosGeoPoint":47,"geoPoint":52,"contacts":18},"Université libre de Bruxelles (ULB)","RECRUITING","Brussels","Belgium","BE",{"type":48,"coordinates":49},"Point",[50,51],4.34878,50.85045,{"lat":51,"lon":50},{"type":54,"investigatorFullName":55,"investigatorTitle":56,"investigatorAffiliation":5,"oldNameTitle":18,"oldOrganization":18},"PRINCIPAL_INVESTIGATOR","Malgorzata Klass","Professor","100637739","effects-of-whole-body-high-intensity-interval-training-on-fitness-in-overweight-adults-100637739",false,"NCT07582718","Effects of Whole-Body High-Intensity Interval Training on Fitness in Overweight Adults","Effects of a Whole-body High-intensity Interval Training on Cardiorespiratory Fitness, Musculoskeletal Fitness, Body Composition and Blood Parameters in Overweight Subjects","WB-HIIT","Inclusion Criteria:\n\n* Adults aged 18 to 55 years.\n* Body mass index (BMI) between 25 and 35 kg\u002Fm².\n* Able to provide written informed consent.\n* Able to safely participate in high-intensity interval training.\n* For participants with BMI \\> 30 kg\u002Fm²: medical clearance from their general practitioner.\n\nExclusion Criteria:\n\n* BMI \\\u003C 25 or \\> 35 kg\u002Fm².\n* Presence of any chronic medical condition other than overweight\u002Fobesity.\n* Known cardiovascular, metabolic, respiratory, or musculoskeletal disease that contraindicates high-intensity exercise.\n* Pregnancy.\n* Inability to perform exercise testing or complete the WB-HIIT program.\n* Any condition judged by investigators to interfere with participation or data interpretation.","ALL","18 Years","55 Years",{"count":69,"type":70},40,"ESTIMATED","INTERVENTIONAL",[73],"NA","This study aims to evaluate the effects of a supervised whole-body high-intensity interval training (WB-HIIT) program on physical fitness and health outcomes in adults with overweight and obesity. WB-HIIT is a practical and time-efficient training modality based on body-weight exercises performed at high intensity with short recovery intervals. It may offer an accessible approach for improving health in individuals with excess body weight.\n\nParticipants aged 18 to 55 years with a body mass index (BMI) between 25 and 35 kg\u002Fm² will take part in a supervised 10-week WB-HIIT program, performed in small groups and led by trained exercise professionals. Before and after the intervention, participants will undergo assessments including DXA-based body composition analysis, fasting blood sampling, muscular strength testing, a Chester step test, a maximal graded treadmill exercise test with gas-exchange analysis to determine VO₂peak, and functional evaluations (chair-stand, arm-curl, and 6-minute walk test). Physical activity and dietary intake will also be recorded.\n\nThe primary objective of the study is to assess whether WB-HIIT improves cardiorespiratory fitness (VO₂peak) in adults with overweight. Secondary objectives include evaluating changes in muscular strength, body composition, metabolic markers, and functional capacity.\n\nThe results may help determine whether an equipment-free WB-HIIT program can serve as an effective and accessible training approach for improving health and physical fitness in adults with overweight and obesity.",[76],"Overweight and\u002For Obesity",[78,79,80,81,82,83,84],"Overweight","Cardiorespiratory Fitness","Body Composition","Muscular Strength","Whole-Body HIIT","Body-Weight Exercise","Metabolic health","2026-05-11",{"date":87,"type":88},"2026-05-13","ACTUAL",{"date":90,"type":88},"2022-11-09",{"date":92,"type":70},"2026-06",{"name":5,"class":6},1]