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{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D009043', 'term': 'Motor Activity'}], 'ancestors': [{'id': 'D001519', 'term': 'Behavior'}]}}, 'protocolSection': {'designModule': {'phases': ['NA'], 'studyType': 'INTERVENTIONAL', 'designInfo': {'allocation': 'RANDOMIZED', 'maskingInfo': {'masking': 'NONE'}, 'primaryPurpose': 'BASIC_SCIENCE', 'interventionModel': 'CROSSOVER'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 11}}, 'statusModule': {'overallStatus': 'COMPLETED', 'startDateStruct': {'date': '2023-04-04', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2025-03', 'completionDateStruct': {'date': '2024-10-02', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2025-03-28', 'studyFirstSubmitDate': '2025-03-24', 'studyFirstSubmitQcDate': '2025-03-28', 'lastUpdatePostDateStruct': {'date': '2025-04-06', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2025-04-06', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2024-10-02', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'Cardiovascular changes', 'timeFrame': 'From enrollment (Day 1) to the end of treatment (9 trials) (Day 11), through study completion, an average of 5 weeks.', 'description': 'The %VO2peak associated with repeated submaximal power sprints (%Pmax), particularly when paired with varying rest periods, remains unknown. The aim of this study was to systematically investigate the cardiovascular changes for better exercise programming, measured in mL/min/kg.'}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['exercise', 'cardiovascular fitness', 'sprint', 'vo2max', 'interval training'], 'conditions': ['Cardiovascular Fitness']}, 'descriptionModule': {'briefSummary': 'The purpose of this study is to investigate the acute effects of different intensities (i.e., 50, 75, and 100% of maximal anaerobic power) of 4-s sprint interval exercise on physiological responses. Secondly, it will determine the relationship between intensity and recovery duration (i.e., 15, 30, or 45-s) that will stimulate the cardiovascular and metabolic systems.', 'detailedDescription': 'Background Short sprint interval training (sSIT) is typically performed at maximal intensity, generating power far above what is needed to reach peak oxygen consumption (VO₂peak). However, the physiological effects of submaximal sprint intensities and different recovery periods are not well understood.\n\nStudy Aim This study examined how power output and oxygen consumption (VO₂) respond to repeated 4-second sprints at 50%, 75%, and 100% of maximal power (Pmax) with rest periods of 15, 30, or 45 seconds.\n\nMethods Eleven recreationally active participants completed nine trials, each consisting of thirty 4-second cycling sprints under different intensity and recovery conditions.'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['ADULT'], 'maximumAge': '30 Years', 'minimumAge': '18 Years', 'healthyVolunteers': True, 'eligibilityCriteria': "Inclusion Criteria:\n\n* Young (18-30),\n* Healthy,\n* Recreationally active, but untrained (not meeting ACSM's recommendations of 150 min/week of moderate-vigorous aerobic exercise)\n\nExclusion Criteria:\n\n* Cardiovascular disease\n* Smoking\n* Subjects who were exercising regularly (\\>75 min/week) were excluded."}, 'identificationModule': {'nctId': 'NCT06912932', 'briefTitle': 'Physiological and Perceptual Responses During 4-Second Exercise', 'organization': {'class': 'OTHER', 'fullName': 'University of Texas at Austin'}, 'officialTitle': 'The Effects of The Exercise Intensity and Rest Duration on Physiological and Perceptual Responses During 4-Second Sprint Interval Exercise', 'orgStudyIdInfo': {'id': 'STUDY00004240-CR01'}}, 'armsInterventionsModule': {'armGroups': [{'type': 'ACTIVE_COMPARATOR', 'label': '50% Pmax and 15-s rest duration', 'description': 'Participants used 50% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'ACTIVE_COMPARATOR', 'label': '50% Pmax and 30-s rest duration', 'description': 'Participants used 50% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'ACTIVE_COMPARATOR', 'label': '50% Pmax and 45-s rest duration4', 'description': 'Participants used 50% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'ACTIVE_COMPARATOR', 'label': '75% Pmax and 15-s rest duration', 'description': 'Participants used 75% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'ACTIVE_COMPARATOR', 'label': '75% Pmax and 30-s rest duration', 'description': 'Participants used 75% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'ACTIVE_COMPARATOR', 'label': '75% Pmax and 45-s rest duration', 'description': 'Participants used 75% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'EXPERIMENTAL', 'label': 'All-out Pmax and 15-s rest duration', 'description': 'Participants used all-out Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'EXPERIMENTAL', 'label': 'all-out Pmax and 30-s rest duration', 'description': 'Participants used all-out Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}, {'type': 'EXPERIMENTAL', 'label': 'all-out Pmax and 45-s rest duration', 'description': 'Participants used all-out Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.', 'interventionNames': ['Behavioral: Preventive']}], 'interventions': [{'name': 'Preventive', 'type': 'BEHAVIORAL', 'description': 'systematically investigate the acute physiological responses induced by three levels of %Pmax intensities (50% and 75% of Pmax and all-out efforts) with three varying rest periods (15, 30, and 45-s) between thirty 4-s sprints.', 'armGroupLabels': ['50% Pmax and 15-s rest duration', '50% Pmax and 30-s rest duration', '50% Pmax and 45-s rest duration4', '75% Pmax and 15-s rest duration', '75% Pmax and 30-s rest duration', '75% Pmax and 45-s rest duration', 'All-out Pmax and 15-s rest duration', 'all-out Pmax and 30-s rest duration', 'all-out Pmax and 45-s rest duration']}]}, 'contactsLocationsModule': {'locations': [{'zip': '78712', 'city': 'Austin', 'state': 'Texas', 'country': 'United States', 'facility': 'Human Performance Laboratory, Department of Kinesiology and Health Education, the University of Texas at Austin', 'geoPoint': {'lat': 30.26715, 'lon': -97.74306}}]}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University of Texas at Austin', 'class': 'OTHER'}, 'responsibleParty': {'type': 'SPONSOR'}}}}