[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100648165":3},{"organization":4,"armGroups":7,"interventions":24,"overallOfficials":29,"centralContacts":38,"locations":44,"responsibleParty":61,"collaborators":63,"id":67,"slug":68,"hasResults":69,"nctId":70,"briefTitle":71,"officialTitle":72,"acronym":29,"eligibilityCriteria":73,"healthyVolunteers":74,"sex":75,"minAge":76,"maxAge":77,"enrollmentInfo":78,"targetDuration":29,"studyType":81,"phases":82,"briefSummary":84,"conditions":85,"keywords":92,"overallStatus":101,"whyStopped":29,"lastUpdateSubmitDate":102,"lastUpdatePostDateStruct":103,"startDateStruct":106,"completionDateStruct":108,"leadSponsor":110,"locationsCount":111},{"fullName":5,"class":6},"University of Wisconsin, Madison","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"Romanian dead lift (RDL) group","EXPERIMENTAL","The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The RDL arm will perform RDL.",[13],"Other: RDL",{"label":15,"type":10,"description":16,"interventionNames":17},"Nordic hamstring exercise (NHE) group","The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The NHE arm will performed NHE",[18],"Other: NHE",{"label":20,"type":10,"description":21,"interventionNames":22},"Sprint group","The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The sprint training program will be performed twice per week with the first day of training focused on shorter distances to focus on acceleration and the second training day focused on maximal velocity. The relative efforts and distances for each training day will mimic a similar prescription to that of the resistance training program.",[23],"Other: Sprint testing",[25,30,34],{"type":6,"name":26,"description":27,"armGroupLabels":28,"otherNames":29},"RDL","The RDL will be performed with a 6 second eccentric component with the athlete returning to the start position with a maximal concentric hip extension.",[9],null,{"type":6,"name":31,"description":32,"armGroupLabels":33,"otherNames":29},"NHE","The NHE will be performed with a 6 second eccentric component.",[15],{"type":6,"name":35,"description":36,"armGroupLabels":37,"otherNames":29},"Sprint testing","The sprint training program will be performed twice per week with the first day of training focused on shorter distances to focus on acceleration and the second training day focused on maximal velocity. The relative efforts and distances for each training day will mimic a similar prescription to that of the resistance training program.",[20],[39],{"name":40,"role":41,"phone":42,"phoneExt":29,"email":43},"Scott K Crawford, PhD","CONTACT","608) 265-1308","skcrawford2@wisc.edu",[45],{"facility":46,"status":29,"city":47,"state":48,"zip":49,"country":50,"countryCode":51,"cosmosGeoPoint":52,"geoPoint":57,"contacts":58},"University of Wisconsin - Madison","Madison","Wisconsin","53705","United States","US",{"type":53,"coordinates":54},"Point",[55,56],-89.40123,43.07305,{"lat":56,"lon":55},[59],{"name":40,"role":41,"phone":60,"phoneExt":29,"email":43},"608-265-1308",{"type":62,"investigatorFullName":29,"investigatorTitle":29,"investigatorAffiliation":29,"oldNameTitle":29,"oldOrganization":29},"SPONSOR",[64],{"name":65,"class":66},"National Strength and Conditioning Association (NSCA) Foundation","UNKNOWN","100648165","comparison-between-eccentric-hamstring-training-and-sprint-specific-training-100648165",false,"NCT07716319","Comparison Between Eccentric Hamstring Training and Sprint-Specific Training","Comparison Between Eccentric Hamstring Strength Training and Sprint-Specific Training on Muscle Hypertrophy, Strength, Power, and Sprint Performance in Club Sport Collegiate Athletes","Inclusion Criteria:\n\n* Age 18-25 years\n* Actively participating in a club team\n* \\>6 months experience with resistance training\n* Minimum of 1 year experience at the high school level in organized team sport\n* No history of hamstring injury within the last 6 months\n* No history of major lower extremity surgery (including back)\n* No acute musculoskeletal injury to the lower extremity\n* Not currently pregnant\n\nExclusion Criteria:\n\n* Unable to refrain from resistance training outside the study\n* Unable to make at least 80% of the training sessions\n* Hamstring injury in the last 6 months\n* History of major lower extremity surgery (including back)\n* Acute musculoskeletal injury to the lower extremity\n* Currently pregnant",true,"ALL","18 Years","25 Years",{"count":79,"type":80},90,"ESTIMATED","INTERVENTIONAL",[83],"NA","The purpose of this study is to compare the effects of an intensity-, volume-, and time under tension-matched eccentric hamstring exercise intervention with the Romanian deadlift (RDL) and the Nordic hamstring exercise (NHE) to a sprint-specific training program on hamstring muscle architecture, volume, sprint performance, strength, and power.\n\nParticipants will be assigned to complete one of the 3 hamstring interventions for 10 weeks.",[86,87,88,89,90,91],"Healthy Adult","Athlete","Exercise Training","Sport","Running","Ultrasound Imaging",[93,94,95,96,97,98,99,100],"strength","agility","sprint","hypertrophy","countermovement jump","fascicle length","hamstring","range of motion","NOT_YET_RECRUITING","2026-07-15",{"date":104,"type":105},"2026-07-21","ACTUAL",{"date":107,"type":80},"2026-09",{"date":109,"type":80},"2027-09",{"name":5,"class":6},1]