Acute changes in knee cartilage transverse relaxation time after running and bicycling
Autor: | Michael D. Noseworthy, Anthony A. Gatti, Elora C. Brenneman, Paul W. Stratford, Jose Tamez-Pena, Monica R. Maly, Saara Totterman |
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Rok vydání: | 2017 |
Předmět: |
Adult
Cartilage Articular Male medicine.medical_specialty Knee Joint Biomedical Engineering Biophysics medicine.disease_cause Running 030218 nuclear medicine & medical imaging Weight-bearing Weight-Bearing Young Adult 03 medical and health sciences 0302 clinical medicine medicine Humans Aerobic exercise Orthopedics and Sports Medicine Femur Tibia Mechanical Phenomena 030203 arthritis & rheumatology Orthodontics business.industry Cartilage Rehabilitation Magnetic Resonance Imaging Bicycling Knee cartilage medicine.anatomical_structure Reaction Transverse Relaxation Time Physical therapy business |
Zdroj: | Journal of Biomechanics. 53:171-177 |
ISSN: | 0021-9290 |
DOI: | 10.1016/j.jbiomech.2017.01.017 |
Popis: | Purpose To compare the acute effect of running and bicycling of an equivalent cumulative load on knee cartilage composition and morphometry in healthy young men. A secondary analysis investigated the relationship between activity history and the change in cartilage composition after activity. Methods In fifteen men (25.8±4.2 years), the vertical ground reaction force was measured to determine the cumulative load exposure of a 15-min run. The vertical pedal reaction force was recorded during bicycling to define the bicycling duration of an equivalent cumulative load. On separate visits that were spaced on average 17 days apart, participants completed these running and bicycling bouts. Mean cartilage transverse relaxation times (T2) were determined for cartilage on the tibia and weight-bearing femur before and after each exercise. T2 was measured using a multi-echo spin-echo sequence and 3T MRI. Cartilage of the weight bearing femur and tibia was segmented using a highly-automated segmentation algorithm. Activity history was captured using the International Physical Activity Questionnaire. Results The response of T2 to bicycling and running was different (p=0.019; mean T2: pre-running=34.27 ms, pre-bicycling=32.93 ms, post-running=31.82 ms, post-bicycling=32.36 ms). While bicycling produced no change (−1.7%, p=0.300), running shortened T2 (−7.1%, p |
Databáze: | OpenAIRE |
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