[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100628488":3},{"organization":4,"armGroups":7,"interventions":17,"overallOfficials":10,"centralContacts":34,"locations":40,"responsibleParty":54,"collaborators":10,"id":56,"slug":57,"hasResults":58,"nctId":59,"briefTitle":60,"officialTitle":61,"acronym":10,"eligibilityCriteria":62,"healthyVolunteers":63,"sex":64,"minAge":65,"maxAge":66,"enrollmentInfo":67,"targetDuration":10,"studyType":70,"phases":10,"briefSummary":71,"conditions":72,"keywords":78,"overallStatus":94,"whyStopped":10,"lastUpdateSubmitDate":95,"lastUpdatePostDateStruct":96,"startDateStruct":99,"completionDateStruct":101,"leadSponsor":103,"locationsCount":104},{"fullName":5,"class":6},"Charles University, Czech Republic","OTHER",[8],{"label":9,"type":10,"description":11,"interventionNames":12},"Physically Active Women (18-35 years)",null,"Women aged 18-35 years from the general population with occasional to recreational physical activity level. Participants undergo repeated non-invasive assessments across predefined menstrual cycle phases, including performance testing, musculoskeletal measurements, body composition assessment, and symptom tracking.",[13,14,15,16],"Other: Menstrual Cycle Tracking","Other: Performance and Strength Testing","Other: Musculoskeletal Assessment","Other: Body Composition and Symptom Assessment",[18,22,26,30],{"type":6,"name":19,"description":20,"armGroupLabels":21,"otherNames":10},"Menstrual Cycle Tracking","Menstrual cycle monitoring using a mobile application for approximately 2 months to schedule laboratory visits to predefined cycle phases.",[9],{"type":6,"name":23,"description":24,"armGroupLabels":25,"otherNames":10},"Performance and Strength Testing","Repeated lower-limb performance\u002Fstrength assessments during laboratory visits in different menstrual cycle phases.",[9],{"type":6,"name":27,"description":28,"armGroupLabels":29,"otherNames":10},"Musculoskeletal Assessment","Non-invasive assessment of selected muscle and tendon mechanical properties across cycle phases.",[9],{"type":6,"name":31,"description":32,"armGroupLabels":33,"otherNames":10},"Body Composition and Symptom Assessment","Body composition measurement and collection of self-reported menstrual-related symptoms at laboratory visits.",[9],[35],{"name":36,"role":37,"phone":38,"phoneExt":10,"email":39},"Vendula Soukupová, Mgr.","CONTACT","+420775976312","vendula.soukupova@ftvs.cuni.cz",[41],{"facility":42,"status":10,"city":43,"state":43,"zip":44,"country":45,"countryCode":10,"cosmosGeoPoint":46,"geoPoint":51,"contacts":52},"Faculty of Physical Education and Sport, Charles University, José Martího 269\u002F31","Prague","16252","Czechia",{"type":47,"coordinates":48},"Point",[49,50],14.42076,50.08804,{"lat":50,"lon":49},[53],{"name":36,"role":37,"phone":38,"phoneExt":10,"email":39},{"type":55,"investigatorFullName":10,"investigatorTitle":10,"investigatorAffiliation":10,"oldNameTitle":10,"oldOrganization":10},"SPONSOR","100628488","menstrual-cycle-and-womens-performance-100628488",false,"NCT07462286","Menstrual Cycle and Women's Performance","The Relationship Between the Menstrual Cycle and Physical Performance in Women","Inclusion Criteria:\n\n* Female, age 18-35 years\n\nPremenopausal\n\nOccasional to recreational level of physical activity\n\nWilling and able to track menstrual cycle using a mobile application for approximately 2 months\n\nWilling and able to attend 3 laboratory visits scheduled to predefined menstrual cycle phases\n\nAble to provide written informed consent\n\nExclusion Criteria:\n\n* Irregular menstrual cycle (outside protocol-defined regularity)\n\nCurrent pregnancy\n\nUse of hormonal medication for therapeutic purposes (per protocol)\n\nCurrent acute illness at time of testing\n\nMusculoskeletal injury of the lower limb limiting safe performance testing\n\nContraindication to body composition assessment methods used in the study (e.g., BIA\u002FDXA, per site protocol)\n\nAny other condition that, in the investigator's judgment, may interfere with safe participation or data quality",true,"FEMALE","18 Years","35 Years",{"count":68,"type":69},32,"ESTIMATED","OBSERVATIONAL","This study examines how different phases of the menstrual cycle are associated with selected performance and musculoskeletal parameters in physically active women aged 18-35 years.\n\nParticipants will track their menstrual cycle using a mobile app for approximately 2 months and attend 3 laboratory visits scheduled to specific cycle phases.\n\nAt each visit, participants will complete non-invasive assessments including lower-limb strength\u002Fperformance testing, musculoskeletal measurements (muscle and tendon properties), body composition assessment, and symptom-related questionnaires.\n\nThe goal is to improve understanding of physiological variability across the menstrual cycle and support evidence-based planning of training, testing, and clinical practice in women.",[73,74,75,76,77],"Menstrual Cycle","Physical Performance","Muscle Strength","Musculoskeletal System","Healthy Volunteers",[79,80,81,82,83,84,85,86,87,88,89,90,91,92,93],"menstrual cycle phase","follicular phase","luteal phase","female athletes","physically active women","neuromuscular performance","lower limb strength","muscle mechanical properties","tendon mechanical properties","body composition","symptom tracking","cycle tracking app","repeated measures","observational study","women's health","NOT_YET_RECRUITING","2026-03-05",{"date":97,"type":98},"2026-03-10","ACTUAL",{"date":100,"type":69},"2026-04-01",{"date":102,"type":69},"2027-03-30",{"name":5,"class":6},1]