Ignite Creation Date:
2026-03-26 @ 3:15 PM
Ignite Modification Date:
2026-03-30 @ 3:01 AM
Study NCT ID:
NCT07418892
Status:
COMPLETED
Last Update Posted:
2026-02-18
First Post:
2026-01-23
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Effects of Resisted Versus Unresisted Sprint Training on Sprint Force-Velocity Profile in Youth Footballers
Sponsor:
Organization:
Raw JSON
{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2026-03-25'}}, 'protocolSection': {'designModule': {'phases': ['NA'], 'studyType': 'INTERVENTIONAL', 'designInfo': {'allocation': 'RANDOMIZED', 'maskingInfo': {'masking': 'SINGLE', 'whoMasked': ['OUTCOMES_ASSESSOR']}, 'primaryPurpose': 'TREATMENT', 'interventionModel': 'PARALLEL'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 44}}, 'statusModule': {'overallStatus': 'COMPLETED', 'startDateStruct': {'date': '2024-08-01', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2026-01', 'completionDateStruct': {'date': '2024-09-20', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2026-02-11', 'studyFirstSubmitDate': '2026-01-23', 'studyFirstSubmitQcDate': '2026-02-11', 'lastUpdatePostDateStruct': {'date': '2026-02-18', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2026-02-18', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2024-09-20', 'type': 'ACTUAL'}}, 'outcomesModule': {'otherOutcomes': [{'measure': 'Change from baseline to post-intervention in stature (standing height)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Stature (standing height), expressed in centimeters (cm).'}, {'measure': 'Change from baseline to post-intervention in body mass', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Body mass, expressed in kilograms (kg).'}, {'measure': 'Change from baseline to post-intervention in body mass index (BMI)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'BMI calculated as body mass (kg) divided by stature squared (m\\^2), expressed as kg/m\\^2.'}], 'primaryOutcomes': [{'measure': 'Change from baseline to post-intervention in best 30 m sprint time', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Best (fastest) 30 m sprint time, expressed in seconds (s). The reported value is the best 30 m time (s).'}], 'secondaryOutcomes': [{'measure': 'Change from baseline to post-intervention in theoretical maximal horizontal force (F0)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived theoretical maximal horizontal force (F0), expressed relative to body mass (N/kg).'}, {'measure': 'Change from baseline to post-intervention in peak sprint velocity', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Peak velocity reached during the sprint assessment, expressed in meters per second (m/s).'}, {'measure': 'Change from baseline to post-intervention in rate of decrease in RF with velocity (DRF)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived rate of decrease in RF with velocity (DRF), expressed as % per m.'}, {'measure': 'Change from baseline to post-intervention in peak ratio of horizontal force (RF_peak)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived peak ratio of horizontal force (RF\\_peak), expressed as percentage (%).'}, {'measure': 'Change from baseline to post-intervention in ratio of horizontal force (RF)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived ratio of horizontal force (RF), expressed as percentage (%).'}, {'measure': 'Change from baseline to post-intervention in maximal horizontal power (Pmax)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived maximal horizontal power (Pmax), expressed relative to body mass (W/kg).'}, {'measure': 'Change from baseline to post-intervention in theoretical maximal running velocity (V0)', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Sprint-derived theoretical maximal running velocity (V0), expressed in meters per second (m/s).'}, {'measure': 'Change from baseline to post-intervention in countermovement jump (CMJ) height', 'timeFrame': 'From baseline assessment (within 1 week prior to first training session) to post-intervention assessment (within 1 week after the final training session), over the 6-week intervention period.', 'description': 'Countermovement jump (CMJ) height, expressed in centimeters (cm). The reported value is CMJ height (cm).'}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['Resisted sprint training', 'Sled towing', 'Unresisted sprinting', 'Youth footballers', 'force-velocity profile', 'Horizontal power', 'RF-peak', 'Countermovement jump'], 'conditions': ['Sprint Force-Velocity-Power Profile', 'Football (Soccer) Sprint Performance']}, 'referencesModule': {'references': [{'type': 'BACKGROUND', 'citation': 'Young, J. D., Whitten, J., Reid, J., Quigley, P. J., Low, J., Li, Y., Lima, C., Hodgson, D., Chaouachi, A., Prieske, O., & Granacher, U. (2017). Effectiveness of Traditional Strength vs. Power Training on Muscle Strength, Power and Speed with Youth: A Systematic Review and Meta-Analysis. Frontiers. https://doi.org/10.3389/fphys.2017.0042'}, {'type': 'BACKGROUND', 'citation': 'Baena-Raya, A., García-Mateo, P., García-Ramos, A., Rodríguez-Pérez, M., & Soriano-Maldonado, A. (2021). Delineating the potential of the vertical and horizontal force-velocity profile for optimizing sport performance: A systematic review. Journal of Sports Sciences, 40, 331 - 344. https://doi.org/10.1080/02640414.2021.199364 Behm, D. G.,'}, {'type': 'BACKGROUND', 'citation': 'Bachero-Mena, B., & González-Badillo, J. (2014). Effects of Resisted Sprint Training on Acceleration With Three Different Loads Accounting for 5, 12.5, and 20% of Body Mass. Journal of Strength and Conditioning Research, 28, 2954-2960. https://doi.org/10.1519/jsc.000000000000049'}, {'type': 'BACKGROUND', 'citation': 'Aquino, R., Gonçalves, L. G., Galgaro, M., Maria, T. S., Rostaiser, E., Garcia, G. R., Neto, M. V. M., & Nakamura, F. Y. (2021). Mach running performance in Brazilian professional soccer players: comparisons between successful and unsuccessful teams. https://doi.org/10.31236/osf.io/jm579'}, {'type': 'BACKGROUND', 'citation': 'Amore, M., Minciacchi, D., Panconi, G., Guarducci, S., Bravi, R., & Sorgente, V. (2024). Impact of Sled-Integrated Resisted Sprint Training on Sprint and Vertical Jump Performance in Young U-14 Male Football Players. Journal of Functional Morphology and Kinesiology, 9. https://doi.org/10.3390/jfmk9040256'}, {'type': 'BACKGROUND', 'citation': 'Alcaraz, P. E., Carlos-Vivas, J., Oponjuru, B. O., & Martínez-Rodríguez, A. (2018). The Effectiveness of Resisted Sled Training (RST) for Sprint Performance: A Systematic Review and Meta-analysis. Sports Medicine, 48(9), 2143-2165. doi:10.1007/s40279-018-0947-8'}]}, 'descriptionModule': {'briefSummary': 'This randomised, controlled, two-arm trial evaluates whether light resisted sprint training (sled towing at 20% of body mass) produces superior improvements in 30 m sprint mechanical outputs compared with matched-dose unresisted sprint training in youth footballers.\n\nParticipants complete two supervised sessions per week for six consecutive weeks, integrated into normal academy microcycles on the same artificial-turf surface. Primary outcomes are changes in sprint-derived force-velocity-power profile parameters and 30 m sprint performance, with secondary outcomes including countermovement jump height and anthropometrics.', 'detailedDescription': "The study uses a parallel-group randomised design. Allocation is stratified by squad category (Under-14 and Juvenile) with simple randomisation within strata using computer-generated random numbers prepared by a researcher not involved in training delivery.\n\nThe intervention is delivered on a third-generation artificial-turf pitch at a youth academy integrated within a professional development pathway. Forty-four outfield players from two squads are enrolled.\n\nBoth arms complete 20 m maximal sprints with identical volume and rest structure (3 sets × 5 repetitions, 45 s inter-repetition rest, 3 min inter-set rest). The experimental arm performs sled towing at 20% body mass (sled tare 3 kg plus plates), whereas the comparator arm performs unresisted maximal sprints. No additional lower-limb strength or speed work beyond the head coach's standard plan is introduced during the intervention period.\n\nPrimary outcomes are derived from 30 m sprint profiling, using high-speed video and the MySprint application to compute split times and estimate sprint mechanical variables within the Morin-Samozino framework. Outcome assessors/video analysts and the statistician are blinded to group codes, while full participant blinding is not feasible due to the presence of the sled."}, 'eligibilityModule': {'sex': 'MALE', 'stdAges': ['CHILD'], 'maximumAge': '17 Years', 'minimumAge': '13 Years', 'healthyVolunteers': False, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* Male football (soccer) player aged 13 to 17 years.\n* Registered Under-14 or Juvenile player in an organized football program/club/league.\n* At least 1 year of organized football experience.\n* Current health-system affiliation (e.g., EPS).\n* Provided informed assent; parent/guardian provided written informed consent (for minors).\n* Able to attend and comply with the sessional training and testing protocol.\n\nExclusion Criteria:\n\n* Current musculoskeletal complaint or injury at baseline.\n* Ongoing rehabilitation at baseline.\n* Logistical constraints preventing participation in the sessional protocol (e.g., inability to attend required sessions/assessments).\n* Injury incurred during the intervention that prevents safe continuation (participant will be withdrawn).'}, 'identificationModule': {'nctId': 'NCT07418892', 'acronym': 'RST-FV Youth F', 'briefTitle': 'Effects of Resisted Versus Unresisted Sprint Training on Sprint Force-Velocity Profile in Youth Footballers', 'organization': {'class': 'OTHER', 'fullName': 'Federal University of Vicosa'}, 'officialTitle': 'Effects of Resisted Versus Non-resisted Sprint Training on Countermovement Jump and Sprint Force-velocity Profile in Youth Footballers: a Randomised Controlled Trial', 'orgStudyIdInfo': {'id': 'CE-042024-6-2024'}}, 'armsInterventionsModule': {'armGroups': [{'type': 'EXPERIMENTAL', 'label': 'Resisted Sprint Training (RST)', 'description': '20 m maximal sprints towing a sled loaded to 20% of individual body mass (sled tare 3 kg; plates added). 3 sets × 5 repetitions, 45 s inter-rep rest, 3 min inter-set rest; two supervised sessions/week for six weeks, conducted at the start of squad training, on the same artificial-turf surface.', 'interventionNames': ['Other: Resisted Sprint Training']}, {'type': 'ACTIVE_COMPARATOR', 'label': 'Unresisted Sprint Training', 'description': '20 m maximal sprints without external resistance; dose and rest schedule identical to RST (3 × 5 × 20 m; 45 s; 3 min); two sessions/week for six weeks; same surface and session placement; standard team training continues.', 'interventionNames': ['Other: Unresisted Sprint Training']}], 'interventions': [{'name': 'Resisted Sprint Training', 'type': 'OTHER', 'description': '20 m maximal sprints towing a sled loaded to 20% of individual body mass (sled tare 3 kg; plates added). 3 sets × 5 repetitions, 45 s inter-rep rest, 3 min inter-set rest; two supervised sessions/week for six weeks, conducted at the start of squad training, on the same artificial-turf surface.', 'armGroupLabels': ['Resisted Sprint Training (RST)']}, {'name': 'Unresisted Sprint Training', 'type': 'OTHER', 'description': '20 m maximal sprints without external resistance; dose and rest schedule identical to RST (3 × 5 × 20 m; 45 s; 3 min); two sessions/week for six weeks; same surface and session placement; standard team training continues.', 'armGroupLabels': ['Unresisted Sprint Training']}]}, 'contactsLocationsModule': {'locations': [{'zip': '054080', 'city': 'Medellín', 'state': 'Antioquia', 'country': 'Colombia', 'facility': 'Universidad de Antioquia', 'geoPoint': {'lat': 6.245, 'lon': -75.57151}}]}, 'ipdSharingStatementModule': {'ipdSharing': 'NO'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'Federal University of Vicosa', 'class': 'OTHER'}, 'collaborators': [{'name': 'Universidad de Antioquia', 'class': 'OTHER'}], 'responsibleParty': {'type': 'SPONSOR'}}}}