Effects of Stride Length and Running Mileage on a Probabilistic Stress Fracture Model
dc.contributor.author | Edwards, W. Brent | |
dc.contributor.author | Taylor, David | |
dc.contributor.author | Rudolphi, Thomas | |
dc.contributor.author | Gillette, Jason | |
dc.contributor.author | Derrick, Timothy | |
dc.contributor.department | Department of Aerospace Engineering | |
dc.contributor.department | Mechanical Engineering | |
dc.contributor.department | Department of Kinesiology | |
dc.date | 2018-02-18T05:26:14.000 | |
dc.date.accessioned | 2020-06-29T22:46:14Z | |
dc.date.available | 2020-06-29T22:46:14Z | |
dc.date.copyright | Thu Jan 01 00:00:00 UTC 2009 | |
dc.date.issued | 2009-01-01 | |
dc.description.abstract | <p>The fatigue life of bone is inversely related to strain magnitude. Decreasing stride length is a potential mechanism of strain reduction during running. If stride length is decreased, the number of loading cycles will increase for a given mileage. It is unclear if increased loading cycles are detrimental to skeletal health despite reductions in strain. Purpose: To determine the effects of stride length and running mileage on the probability of tibial stress fracture. Methods: Ten male subjects ran overground at their preferred running velocity during two conditions: preferred stride length and 10% reduction in preferred stride length. Force platform and kinematic data were collected concurrently. A combination of experimental and musculoskeletal modeling techniques was used to determine joint contact forces acting on the distal tibia. Peak instantaneous joint contact forces served as inputs to a finite element model to estimate tibial strains during stance. Stress fracture probability for stride length conditions and three running mileages (3, 5, and 7 miles·d−1) were determined using a probabilistic model of bone damage, repair, and adaptation. Differences in stress fracture probability were compared between conditions using a 2 × 3 repeated-measures ANOVA. Results: The main effects of stride length (P = 0.017) and running mileage (P = 0.001) were significant. Reducing stride length decreased the probability of stress fracture by 3% to 6%. Increasing running mileage increased the probability of stress fracture by 4% to 10%. Conclusions: Results suggest that strain magnitude plays a more important role in stress fracture development than the total number of loading cycles. Runners wishing to decrease their probability for tibial stress fracture may benefit from a 10% reduction in stride length.</p> | |
dc.description.comments | <p>This is a non-final version of an article published in final form in <em>Medicine & Science in Sports & Exercise </em>41 (2009): 2177, doi: <a href="http://dx.doi.org/10.1249/MSS.0b013e3181a984c4" target="_blank">10.1249/MSS.0b013e3181a984c4</a>. Posted with permission.</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/aere_pubs/77/ | |
dc.identifier.articleid | 1076 | |
dc.identifier.contextkey | 9848585 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | aere_pubs/77 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/2080 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/aere_pubs/77/2009_Rudolphi_EffectsStride.pdf|||Sat Jan 15 01:52:39 UTC 2022 | |
dc.source.uri | 10.1249/MSS.0b013e3181a984c4 | |
dc.subject.disciplines | Biomedical Engineering and Bioengineering | |
dc.subject.keywords | bone fatigue | |
dc.subject.keywords | overuse injury | |
dc.subject.keywords | tibia | |
dc.subject.keywords | musculoskeletal model | |
dc.title | Effects of Stride Length and Running Mileage on a Probabilistic Stress Fracture Model | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | 2537ff92-38ac-45c4-9cb4-dad9a0680db8 | |
relation.isAuthorOfPublication | bdf70773-aed0-41eb-bd40-438f1d7c646b | |
relation.isAuthorOfPublication | 6c34a3bd-cf2d-4b52-b44c-76560be15de4 | |
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