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
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
relation.isOrgUnitOfPublication f7b0f2ca-8e43-4084-8a10-75f62e5199dd
File
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
2009_Rudolphi_EffectsStride.pdf
Size:
328.51 KB
Format:
Adobe Portable Document Format
Description:
Collections