Journal articles
Ellison M, Kenny M, Fulford J, Javadi A, Rice H (In Press). Incorporating subject-specific geometry to compare metatarsal stress during running with different foot strike patterns. Journal of Biomechanics
Ellison MA, Gorman AJ, Brown O, Mullineaux DR, Mulloy F (2023). Head-torso coordination in police officers wearing loaded tactical vests during running. Gait & Posture, 107, 28-34.
Ellison MA, Fulford J, Javadi A, Rice HM (2021). Do non-rearfoot runners experience greater second metatarsal stresses than rearfoot runners?.
J Biomech,
126Abstract:
Do non-rearfoot runners experience greater second metatarsal stresses than rearfoot runners?
Stress fracture of the second metatarsal is a common and problematic injury for runners. The choice of foot strike pattern is known to affect external kinetics and kinematics but its effect on internal loading of the metatarsals is not well understood. Models of various complexities can be used to investigate the effects of running characteristics on metatarsal stresses. This study aimed to compare second metatarsal stress between habitual rearfoot and non-rearfoot strikers during barefoot running, using a novel participant-specific finite element model, including accurate metatarsal and soft tissue geometry. Synchronised force and kinematic data were collected during barefoot overground running from 20 participants (12 rearfoot strikers). Stresses were calculated using a previously evaluated and published 3D finite element model. Non-rearfoot strikers demonstrated greater external loading and joint contact forces than rearfoot runners, but there were no differences in stresses between groups. Additionally, the study allowed for a qualitative assessment of bone geometries and stresses. No correlation was found between bone volume and stresses, however, there was found to be a large variation in metatarsal shapes, possibly accounting for the lack of difference in stresses. This emphasises the importance of bone geometry when estimating bone stress and supports the suggestion that external forces should not be assumed to be representative of internal loading.
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Author URL.
Ellison MA, Akrami M, Fulford J, Javadi AA, Rice HM (2020). Three dimensional finite element modelling of metatarsal stresses during running. Journal of Medical Engineering & Technology, 44(7), 368-377.
Rice HM, Kenny M, Ellison MA, Fulford J, Meardon SA, Derrick TR, Hamill J (2020). Tibial stress during running following a repeated calf‐raise protocol.
Scandinavian Journal of Medicine & Science in Sports,
30(12), 2382-2389.
Abstract:
Tibial stress during running following a repeated calf‐raise protocol
Tibial stress fractures are a problematic injury among runners. Increased loading of the tibia has been observed following prolonged weight‐bearing activity and is suggested to be the result of reduced activity of the plantar flexor muscles. The musculature that spans the tibia contributes to bending of the bone and influences the magnitude of stress on the tibia during running. Participant‐specific models of the tibia can be used as a non‐invasive estimate of tibial stress. This study aimed to quantify tibial stress during running using participant‐specific bone geometry and to compare tibial stress before and after a protocol of repeated muscular contractions of the plantar flexor muscle group. Fourteen participants who run recreationally were included in the final analysis of the study. Synchronized force and kinematic data were collected during overground running before and after an exhaustive, weighted calf‐raise protocol. Bending moments and stress at the distal third of the tibia were estimated using beam theory combined with inverse dynamics and musculoskeletal modeling. Bone geometry was obtained from magnetic resonance images. There was no difference in stress at the anterior, posterior, medial, or lateral peripheries of the tibia after the calf‐raise protocol compared with before. These findings suggest that an exhaustive, repeated calf‐raise protocol did not alter tibial stress during running.
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Conferences
Ellison M (2023). Biomechanical changes associated with heavy load carriage using differing rucksack designs. International Society of Biomechanics. 30th Jul - 3rd Aug 2023.
Ellison M, Rice H, Akrami M, Javadi AA (2019). Developing a Finite Element Model to Investigate Second Metatarsal Stress During Running. UK Association for Computational Mechanics Conference 2019. 10th - 12th Apr 2019.
Ellison M, Javadi AA, Akrami M, Rice H (2019). Using a Finite Element Model to Investigate Second Metatarsal Stress During Running. International and American society of biomechanics (ISB/ASB 2019). 31st Jul - 4th Aug 2019.
Abstract:
Using a Finite Element Model to Investigate Second Metatarsal Stress During Running
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