[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100633707":3},{"organization":4,"armGroups":7,"interventions":30,"overallOfficials":35,"centralContacts":47,"locations":53,"responsibleParty":66,"collaborators":69,"id":72,"slug":73,"hasResults":74,"nctId":75,"briefTitle":76,"officialTitle":77,"acronym":78,"eligibilityCriteria":79,"healthyVolunteers":80,"sex":81,"minAge":82,"maxAge":35,"enrollmentInfo":83,"targetDuration":35,"studyType":86,"phases":87,"briefSummary":89,"conditions":90,"keywords":92,"overallStatus":97,"whyStopped":35,"lastUpdateSubmitDate":98,"lastUpdatePostDateStruct":99,"startDateStruct":102,"completionDateStruct":104,"leadSponsor":106,"locationsCount":107},{"fullName":5,"class":6},"Inonu University","OTHER",[8,14,20,25],{"label":9,"type":10,"description":11,"interventionNames":12},"Placebo","PLACEBO_COMPARATOR","Participants receive placebo condition.",[13],"Dietary Supplement: Placebo",{"label":15,"type":16,"description":17,"interventionNames":18},"L-tyrosine","EXPERIMENTAL","Participants receive L-tyrosine condition.",[19],"Dietary Supplement: L-Tyrosine",{"label":21,"type":16,"description":22,"interventionNames":23},"Caffeine","Participants receive caffeine condition.",[24],"Dietary Supplement: Caffeine",{"label":26,"type":16,"description":27,"interventionNames":28},"Combined","Participants receive combined supplementation condition.",[29],"Dietary Supplement: L-tyrosine + Caffeine",[31,36,40,43],{"type":32,"name":9,"description":33,"armGroupLabels":34,"otherNames":35},"DIETARY_SUPPLEMENT","Placebo solution matched in taste and volume to active supplements.",[9],null,{"type":32,"name":37,"description":38,"armGroupLabels":39,"otherNames":35},"L-Tyrosine","L-tyrosine at 150 mg\u002Fkg body weight administered 60 minutes before exercise.",[15],{"type":32,"name":21,"description":41,"armGroupLabels":42,"otherNames":35},"Caffeine at 5 mg\u002Fkg body weight administered 60 minutes before exercise.",[21],{"type":32,"name":44,"description":45,"armGroupLabels":46,"otherNames":35},"L-tyrosine + Caffeine","Combined L-tyrosine (150 mg\u002Fkg) and caffeine (5 mg\u002Fkg) administered 60 minutes before exercise.",[26],[48],{"name":49,"role":50,"phone":51,"phoneExt":35,"email":52},"Halil UÇAR","CONTACT","+90 5462921133","halil.ucar@inonu.edu.tr",[54],{"facility":55,"status":35,"city":56,"state":35,"zip":35,"country":57,"countryCode":35,"cosmosGeoPoint":58,"geoPoint":63,"contacts":64},"Ataturk University Faculty of Sport Sciences","Erzurum","Turkey (Türkiye)",{"type":59,"coordinates":60},"Point",[61,62],41.27694,39.90861,{"lat":62,"lon":61},[65],{"name":49,"role":50,"phone":51,"phoneExt":35,"email":52},{"type":67,"investigatorFullName":49,"investigatorTitle":68,"investigatorAffiliation":5,"oldNameTitle":35,"oldOrganization":35},"PRINCIPAL_INVESTIGATOR","Research Assistant and PhD Student",[70],{"name":71,"class":6},"Ataturk University","100633707","effects-of-l-tyrosine-and-caffeine-on-performance-in-elite-boxers-100633707",false,"NCT07530185","Effects of L-Tyrosine and Caffeine on Performance in Elite Boxers","Effects of L-Tyrosine and Caffeine Supplementation on Cognitive, Physical, and Physiological Parameters in Elite Boxers: A Randomized Double-Blind Placebo-Controlled Crossover Study","TYCAF-BOX","Inclusion Criteria:\n\nMale elite boxers aged ≥18 years At least 8 years of boxing training experience Active participation in national or international competitions Regular training schedule No injury or illness affecting performance\n\nExclusion Criteria:\n\nUse of nutritional supplements or stimulants within the last 4 weeks Any cardiovascular, metabolic, or neurological disorder Current injury or musculoskeletal limitation Smoking or excessive caffeine intake Failure to comply with study procedures",true,"MALE","18 Years",{"count":84,"type":85},18,"ESTIMATED","INTERVENTIONAL",[88],"NA","Participants will complete five sessions, including one familiarization and baseline session and four experimental conditions (placebo, L-tyrosine, caffeine, and combined supplementation). The baseline session will include resting measurements. The experimental conditions will be performed in a randomized, counterbalanced crossover design with a washout period of at least 72 hours between sessions.",[91],"Sports Performance",[15,21,93,94,95,96],"Boxing","BDNF","Cognitive performance","Anaerobic performance","NOT_YET_RECRUITING","2026-04-08",{"date":100,"type":101},"2026-04-15","ACTUAL",{"date":103,"type":85},"2026-04",{"date":105,"type":85},"2027-03",{"name":5,"class":6},1]