Raw JSON
{'hasResults': True, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'interventionBrowseModule': {'meshes': [{'id': 'D015444', 'term': 'Exercise'}], 'ancestors': [{'id': 'D009043', 'term': 'Motor Activity'}, {'id': 'D009068', 'term': 'Movement'}, {'id': 'D009142', 'term': 'Musculoskeletal Physiological Phenomena'}, {'id': 'D055687', 'term': 'Musculoskeletal and Neural Physiological Phenomena'}]}}, 'resultsSection': {'moreInfoModule': {'pointOfContact': {'email': 'k-hayashi@kokugakuin.ac.jp', 'phone': '512-471-8594', 'title': 'Koichiro Hayashi', 'organization': 'University of Texas at Austin'}, 'certainAgreement': {'piSponsorEmployee': True}}, 'adverseEventsModule': {'timeFrame': 'Each participant was followed for a span of 4 days. After the downhill running protocol, various markers of muscle damage and muscular strength were obtained 24 hours post (the third visit), 48 hours post (the forth visit) and 72 hours post (the fifth visit).', 'description': 'This is an acute exercise study. No adverse events were reported.', 'eventGroups': [{'id': 'EG000', 'title': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit\n\nexercise: acute downhill running', 'otherNumAtRisk': 15, 'deathsNumAtRisk': 15, 'otherNumAffected': 0, 'seriousNumAtRisk': 15, 'deathsNumAffected': 0, 'seriousNumAffected': 0}, {'id': 'EG001', 'title': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle.\n\nexercise: acute downhill running', 'otherNumAtRisk': 10, 'deathsNumAtRisk': 10, 'otherNumAffected': 0, 'seriousNumAtRisk': 10, 'deathsNumAffected': 0, 'seriousNumAffected': 0}, {'id': 'EG002', 'title': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit\n\nexercise: acute downhill running', 'otherNumAtRisk': 14, 'deathsNumAtRisk': 14, 'otherNumAffected': 0, 'seriousNumAtRisk': 14, 'deathsNumAffected': 0, 'seriousNumAffected': 0}, {'id': 'EG003', 'title': 'Older Unfit', 'description': 'Older (50-80 yrs) people who have sedentary lifestyle\n\nexercise: acute downhill running', 'otherNumAtRisk': 0, 'deathsNumAtRisk': 0, 'otherNumAffected': 0, 'seriousNumAtRisk': 0, 'deathsNumAffected': 0, 'seriousNumAffected': 0}], 'frequencyThreshold': '0'}, 'outcomeMeasuresModule': {'outcomeMeasures': [{'type': 'PRIMARY', 'title': 'Rate of Force Development', 'denoms': [{'units': 'Participants', 'counts': [{'value': '15', 'groupId': 'OG000'}, {'value': '10', 'groupId': 'OG001'}, {'value': '14', 'groupId': 'OG002'}]}], 'groups': [{'id': 'OG000', 'title': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit\n\nexercise: acute downhill running'}, {'id': 'OG001', 'title': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle.\n\nexercise: acute downhill running'}, {'id': 'OG002', 'title': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit\n\nexercise: acute downhill running'}], 'classes': [{'title': 'Baseline', 'categories': [{'measurements': [{'value': '102', 'spread': '3', 'groupId': 'OG000'}, {'value': '108', 'spread': '4', 'groupId': 'OG001'}, {'value': '100', 'spread': '2', 'groupId': 'OG002'}]}]}, {'title': '24h post', 'categories': [{'measurements': [{'value': '97', 'spread': '3', 'groupId': 'OG000'}, {'value': '106', 'spread': '4', 'groupId': 'OG001'}, {'value': '100', 'spread': '3', 'groupId': 'OG002'}]}]}, {'title': '48h post', 'categories': [{'measurements': [{'value': '100', 'spread': '2', 'groupId': 'OG000'}, {'value': '106', 'spread': '5', 'groupId': 'OG001'}, {'value': '103', 'spread': '3', 'groupId': 'OG002'}]}]}, {'title': '72h post', 'categories': [{'measurements': [{'value': '102', 'spread': '2', 'groupId': 'OG000'}, {'value': '105', 'spread': '4', 'groupId': 'OG001'}, {'value': '103', 'spread': '2', 'groupId': 'OG002'}]}]}], 'paramType': 'MEAN', 'timeFrame': 'After the downhill running protocol, various markers of muscle damage and muscular strength were obtained 24 hours post (the third visit), 48 hours post (the forth visit) and 72 hours post (the fifth visit).', 'description': 'Rate of force development are measured by determining peak torque achieved on an isometric leg extension machine.', 'unitOfMeasure': 'Nm', 'dispersionType': 'Standard Error', 'reportingStatus': 'POSTED'}, {'type': 'SECONDARY', 'title': 'Pain Scale', 'denoms': [{'units': 'Participants', 'counts': [{'value': '15', 'groupId': 'OG000'}, {'value': '10', 'groupId': 'OG001'}, {'value': '14', 'groupId': 'OG002'}]}], 'groups': [{'id': 'OG000', 'title': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit\n\nexercise: acute downhill running'}, {'id': 'OG001', 'title': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle.\n\nexercise: acute downhill running'}, {'id': 'OG002', 'title': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit\n\nexercise: acute downhill running'}], 'classes': [{'title': 'Baseline', 'categories': [{'measurements': [{'value': '0.2', 'spread': '0.1', 'groupId': 'OG000'}, {'value': '0.1', 'spread': '0.1', 'groupId': 'OG001'}, {'value': '0.0', 'spread': '0.0', 'groupId': 'OG002'}]}]}, {'title': '24h post', 'categories': [{'measurements': [{'value': '3.7', 'spread': '0.5', 'groupId': 'OG000'}, {'value': '4.7', 'spread': '0.6', 'groupId': 'OG001'}, {'value': '2.4', 'spread': '0.6', 'groupId': 'OG002'}]}]}, {'title': '48h post', 'categories': [{'measurements': [{'value': '4.2', 'spread': '0.6', 'groupId': 'OG000'}, {'value': '4.9', 'spread': '0.7', 'groupId': 'OG001'}, {'value': '2.7', 'spread': '0.6', 'groupId': 'OG002'}]}]}, {'title': '72h post', 'categories': [{'measurements': [{'value': '2.7', 'spread': '0.5', 'groupId': 'OG000'}, {'value': '3.2', 'spread': '0.8', 'groupId': 'OG001'}, {'value': '1.5', 'spread': '0.4', 'groupId': 'OG002'}]}]}], 'paramType': 'MEAN', 'timeFrame': 'After the downhill running protocol, muscle damage pain scale was measured 24 hours post (the third visit), 48 hours post (the forth visit) and 72 hours post (the fifth visit).', 'description': 'Pain scale on quadriceps muscle was assessed using a validated visual pain scale. The scale was on a 10-point scale (0 being absence of soreness, 10 being worst imaginable soreness).', 'unitOfMeasure': 'arbitrary scale unit from 0 to 10', 'dispersionType': 'Standard Error', 'reportingStatus': 'POSTED'}]}, 'participantFlowModule': {'groups': [{'id': 'FG000', 'title': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit'}, {'id': 'FG001', 'title': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle'}, {'id': 'FG002', 'title': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit'}, {'id': 'FG003', 'title': 'Older Unfit', 'description': 'Older (50-80 yrs) people who have sedentary lifestyle'}], 'periods': [{'title': 'Overall Study', 'milestones': [{'type': 'STARTED', 'achievements': [{'groupId': 'FG000', 'numSubjects': '15'}, {'groupId': 'FG001', 'numSubjects': '10'}, {'groupId': 'FG002', 'numSubjects': '14'}, {'comment': 'We were not able to recruit older unfit adults so this group was dropped from the study.', 'groupId': 'FG003', 'numSubjects': '0'}]}, {'type': 'COMPLETED', 'achievements': [{'groupId': 'FG000', 'numSubjects': '15'}, {'groupId': 'FG001', 'numSubjects': '10'}, {'groupId': 'FG002', 'numSubjects': '14'}, {'groupId': 'FG003', 'numSubjects': '0'}]}, {'type': 'NOT COMPLETED', 'achievements': [{'groupId': 'FG000', 'numSubjects': '0'}, {'groupId': 'FG001', 'numSubjects': '0'}, {'groupId': 'FG002', 'numSubjects': '0'}, {'groupId': 'FG003', 'numSubjects': '0'}]}]}], 'recruitmentDetails': 'We planned to recruit a total of 60 participants. However, we were not able to recruit older unfit adults so this group was dropped from the study. Additionally, this was a research project conducted by a visiting scholar and his departure approached quickly so the study was closed prematurely with smaller numbers in each group.'}, 'baselineCharacteristicsModule': {'denoms': [{'units': 'Participants', 'counts': [{'value': '15', 'groupId': 'BG000'}, {'value': '10', 'groupId': 'BG001'}, {'value': '14', 'groupId': 'BG002'}, {'value': '39', 'groupId': 'BG003'}]}], 'groups': [{'id': 'BG000', 'title': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit'}, {'id': 'BG001', 'title': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle'}, {'id': 'BG002', 'title': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit'}, {'id': 'BG003', 'title': 'Total', 'description': 'Total of all reporting groups'}], 'measures': [{'title': 'Age, Continuous', 'classes': [{'title': 'Age', 'categories': [{'measurements': [{'value': '27', 'spread': '2', 'groupId': 'BG000'}, {'value': '28', 'spread': '2', 'groupId': 'BG001'}, {'value': '58', 'spread': '2', 'groupId': 'BG002'}, {'value': '38', 'spread': '2', 'groupId': 'BG003'}]}]}], 'paramType': 'MEAN', 'unitOfMeasure': 'years', 'dispersionType': 'STANDARD_DEVIATION'}, {'title': 'Sex: Female, Male', 'classes': [{'categories': [{'title': 'Female', 'measurements': [{'value': '5', 'groupId': 'BG000'}, {'value': '6', 'groupId': 'BG001'}, {'value': '8', 'groupId': 'BG002'}, {'value': '19', 'groupId': 'BG003'}]}, {'title': 'Male', 'measurements': [{'value': '10', 'groupId': 'BG000'}, {'value': '4', 'groupId': 'BG001'}, {'value': '6', 'groupId': 'BG002'}, {'value': '20', 'groupId': 'BG003'}]}]}], 'paramType': 'COUNT_OF_PARTICIPANTS', 'unitOfMeasure': 'Participants'}, {'title': 'Ethnicity (NIH/OMB)', 'classes': [{'categories': [{'title': 'Hispanic or Latino', 'measurements': [{'value': '1', 'groupId': 'BG000'}, {'value': '0', 'groupId': 'BG001'}, {'value': '1', 'groupId': 'BG002'}, {'value': '2', 'groupId': 'BG003'}]}, {'title': 'Not Hispanic or Latino', 'measurements': [{'value': '14', 'groupId': 'BG000'}, {'value': '10', 'groupId': 'BG001'}, {'value': '13', 'groupId': 'BG002'}, {'value': '37', 'groupId': 'BG003'}]}, {'title': 'Unknown or Not Reported', 'measurements': [{'value': '0', 'groupId': 'BG000'}, {'value': '0', 'groupId': 'BG001'}, {'value': '0', 'groupId': 'BG002'}, {'value': '0', 'groupId': 'BG003'}]}]}], 'paramType': 'COUNT_OF_PARTICIPANTS', 'unitOfMeasure': 'Participants'}], 'populationDescription': 'We were not able to recruit older sedentary partcipants so this group was dropped from the data analyses.'}}, 'documentSection': {'largeDocumentModule': {'largeDocs': [{'date': '2016-08-22', 'size': 54747, 'label': 'Study Protocol and Statistical Analysis Plan', 'hasIcf': False, 'hasSap': True, 'filename': 'Prot_SAP_000.pdf', 'typeAbbrev': 'Prot_SAP', 'uploadDate': '2020-12-21T10:06', 'hasProtocol': True}]}}, 'protocolSection': {'designModule': {'phases': ['NA'], 'studyType': 'INTERVENTIONAL', 'designInfo': {'allocation': 'NON_RANDOMIZED', 'maskingInfo': {'masking': 'NONE'}, 'primaryPurpose': 'OTHER', 'interventionModel': 'PARALLEL'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 60}}, 'statusModule': {'whyStopped': 'This was a research project that was conducted by a visiting scholar and his time for departure came earlier than the study completion.', 'overallStatus': 'TERMINATED', 'startDateStruct': {'date': '2016-08-01', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2021-01', 'completionDateStruct': {'date': '2017-09-01', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2021-01-19', 'studyFirstSubmitDate': '2016-09-02', 'resultsFirstSubmitDate': '2020-11-23', 'studyFirstSubmitQcDate': '2016-09-08', 'lastUpdatePostDateStruct': {'date': '2021-01-22', 'type': 'ACTUAL'}, 'resultsFirstSubmitQcDate': '2021-01-19', 'studyFirstPostDateStruct': {'date': '2016-09-14', 'type': 'ESTIMATED'}, 'resultsFirstPostDateStruct': {'date': '2021-01-22', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2017-09-01', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'Rate of Force Development', 'timeFrame': 'After the downhill running protocol, various markers of muscle damage and muscular strength were obtained 24 hours post (the third visit), 48 hours post (the forth visit) and 72 hours post (the fifth visit).', 'description': 'Rate of force development are measured by determining peak torque achieved on an isometric leg extension machine.'}], 'secondaryOutcomes': [{'measure': 'Pain Scale', 'timeFrame': 'After the downhill running protocol, muscle damage pain scale was measured 24 hours post (the third visit), 48 hours post (the forth visit) and 72 hours post (the fifth visit).', 'description': 'Pain scale on quadriceps muscle was assessed using a validated visual pain scale. The scale was on a 10-point scale (0 being absence of soreness, 10 being worst imaginable soreness).'}]}, 'oversightModule': {'oversightHasDmc': False}, 'conditionsModule': {'keywords': ['Delayed Onset Muscle Soreness', 'Eccentric exercise', 'Masters athlete'], 'conditions': ['Muscles']}, 'referencesModule': {'references': [{'pmid': '17350334', 'type': 'BACKGROUND', 'citation': 'Lavender AP, Nosaka K. Changes in markers of muscle damage of middle-aged and young men following eccentric exercise of the elbow flexors. J Sci Med Sport. 2008 Apr;11(2):124-31. doi: 10.1016/j.jsams.2006.11.004. Epub 2007 Mar 9.'}, {'pmid': '2347319', 'type': 'BACKGROUND', 'citation': 'Dedrick ME, Clarkson PM. The effects of eccentric exercise on motor performance in young and older women. Eur J Appl Physiol Occup Physiol. 1990;60(3):183-6. doi: 10.1007/BF00839156.'}, {'pmid': '2316632', 'type': 'BACKGROUND', 'citation': 'Brooks SV, Faulkner JA. Contraction-induced injury: recovery of skeletal muscles in young and old mice. Am J Physiol. 1990 Mar;258(3 Pt 1):C436-42. doi: 10.1152/ajpcell.1990.258.3.C436.'}, {'pmid': '8961197', 'type': 'BACKGROUND', 'citation': 'Brooks SV, Faulkner JA. The magnitude of the initial injury induced by stretches of maximally activated muscle fibres of mice and rats increases in old age. J Physiol. 1996 Dec 1;497 ( Pt 2)(Pt 2):573-80. doi: 10.1113/jphysiol.1996.sp021790.'}], 'seeAlsoLinks': [{'url': 'http://www.ncbi.nlm.nih.gov/pubmed', 'label': 'Pubmed'}]}, 'descriptionModule': {'briefSummary': 'The purpose of this study to determine if older adults who are healthy and physically active (i.e., Masters athletes) demonstrate slower rates of recovery from unaccustomed strenuous exercise of downhill running than younger peers.', 'detailedDescription': 'There is a well-conceived notion that the recovery from strenuous exercise gets slower as individuals get older in age. Studies using animal models have demonstrated that stretching of electrically-activated skeletal muscle to mimic eccentric muscle contractions results in a greater decline and slower recovery in muscular force in old mice than in young mice. Similarly, in human studies using sedentary adults, age has been associated with a slower rate of recovery from a series of eccentric contractions. However, the process of aging is often confounded by coexisting diseases and gradual sedentary lifestyles that progress with advancing aging. Could older adults who are apparently healthy and habitually exercising demonstrate slower rates of recovery from strenuous exercise? In a small-scale study, recreationally-active middle-aged adults did not display a slower recovery from unaccustomed eccentric exercise than young adults. Masters athletes are an effective experimental model to address this question as extrinsic factors (e.g., deconditioning, chronic degenerative diseases) that often confound the intrinsic aging process can be minimized in this population. As no study has been conducted in Masters athletes, it is unknown if Masters athletes would experience slower rates of recovery similar to their sedentary peers.\n\nWith this information as background, the general aim of the proposed study is to determine if older adults who are healthy and physically active demonstrate slower rates of recovery from unaccustomed strenuous exercise of downhill running than younger peers. In an attempt to properly determine the influence of aging and regular physical activity, 4 groups of apparently healthy adults, including young sedentary, young trained, older sedentary, and older trained adults, will be studied.\n\nA total of 60 apparently healthy men and women will serve as subjects. Half will be young \\[18-40-year-old (n=30)\\] and the other half older \\[50-80-year-old (n=30)\\]. After the screening and familiarization, investigators will ask participants to visit the laboratory four times (four consecutive days) to perform downhill running and to test physiological measurements (muscular strength, pain scale, range of motion, arterial stiffness and blood pressure and blood creatinine and myoglobin concentrations).'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['ADULT', 'OLDER_ADULT'], 'maximumAge': '80 Years', 'minimumAge': '18 Years', 'healthyVolunteers': True, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* Sedentary (exercise \\< 1 time/week) or well-trained individuals (exercise ≧ 2 times/week)\n* Ages 18-39 and 50-80 years\n* Individuals who can safely exercise\n\nExclusion Criteria:\n\n* Individuals who reports "Symptoms or Signs Suggestive of Disease" on the Health Research Questionnaire (heart and respiratory problems, dizziness and ankle edema).\n* Individuals who report substance abuse within the last 6 months (elicit drugs, alcohol)\n* Smokers'}, 'identificationModule': {'nctId': 'NCT02899650', 'briefTitle': 'Rates of Recovery From Strenuous Exercise in Physically Active Older Adults', 'organization': {'class': 'OTHER', 'fullName': 'University of Texas at Austin'}, 'officialTitle': 'Rates of Recovery From Strenuous Exercise in Physically Active Older Adults', 'orgStudyIdInfo': {'id': '2016-04-0070'}}, 'armsInterventionsModule': {'armGroups': [{'type': 'EXPERIMENTAL', 'label': 'Young Fit', 'description': 'Young (18-39 yrs) people who have endurance training habit', 'interventionNames': ['Other: exercise']}, {'type': 'EXPERIMENTAL', 'label': 'Young Unfit', 'description': 'Young (18-39 yrs) people who have sedentary lifestyle.', 'interventionNames': ['Other: exercise']}, {'type': 'EXPERIMENTAL', 'label': 'Older Fit', 'description': 'Older (50-80 yrs) people who have endurance training habit', 'interventionNames': ['Other: exercise']}, {'type': 'EXPERIMENTAL', 'label': 'Older Unfit', 'description': 'Older (50-80 yrs) people who have sedentary lifestyle', 'interventionNames': ['Other: exercise']}], 'interventions': [{'name': 'exercise', 'type': 'OTHER', 'description': 'acute downhill running', 'armGroupLabels': ['Older Fit', 'Older Unfit', 'Young Fit', 'Young Unfit']}]}, 'contactsLocationsModule': {'locations': [{'zip': '78712', 'city': 'Austin', 'state': 'Texas', 'country': 'United States', 'facility': 'Cardiovascular Aging Research Lab at UT Austin', 'geoPoint': {'lat': 30.26715, 'lon': -97.74306}}]}, 'ipdSharingStatementModule': {'ipdSharing': 'NO'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University of Texas at Austin', 'class': 'OTHER'}, 'responsibleParty': {'type': 'PRINCIPAL_INVESTIGATOR', 'investigatorTitle': 'Professor', 'investigatorFullName': 'Hirofumi Tanaka', 'investigatorAffiliation': 'University of Texas at Austin'}}}}