Publications by category
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, 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.
Abstract.
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.
Conferences
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
Abstract.
Publications by year
In Press
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
2021
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.
Abstract.
Author URL.
2020
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.
2019
Kenny M, Ellison M, Rice HM (2019). Code to digitise MR bone images and calculate properties of 'hollow' shape in Matlab: estimates cross-sectional area, area moment of inertia, product moment of area.
Abstract:
Code to digitise MR bone images and calculate properties of 'hollow' shape in Matlab: estimates cross-sectional area, area moment of inertia, product moment of area
Code to digitise MR image of bone and calculate properties of shape:
cross-sectional area, area moment of inertia and product moment of area.
Import jpeg of MR image of bone cropped to the region of interest.
Basic image processing and edge detection to digitise bone.
Align bone and find coordinates of anterior, posterior, medial and lateral points.
Calculate properties of digitised shape in m, m^2, m^4.
Outputs include area moment of inertia approximation [Ix, Iy], product moment of area approximation, cross sectional area approximation.
A sample image file (jpeg) and processing steps document (pdf) are included. The code is named 'Bone_digitisation' and requires the deposited function 'triangle_approximation_function' for use.
Abstract.
Kenny M, Ellison M, Rice H (2019). Code to digitise MR bone images and calculate properties of shape: cross-sectional area, area moment of inertia, product moment of area.
Abstract:
Code to digitise MR bone images and calculate properties of shape: cross-sectional area, area moment of inertia, product moment of area
Updated code to digitise MR image of bone and calculate properties of shape:
cross-sectional area, area moment of inertia and product moment of area.
Import jpeg of MR image of bone cropped to the region of interest.
Basic image processing and edge detection to digitise bone.
Align bone and find coordinates of anterior, posterior, medial and lateral points.
Calculate properties of digitised shape in m, m^2, m^4.
Outputs include area moment of inertia approximation [Ix, Iy], product moment of area approximation, cross sectional area approximation.
A sample image file (jpeg) and processing steps document (pdf) are included. The code is named 'Bone_digitisation' and requires the deposited function 'triangle_approximation_function' for use.
Abstract.
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
Abstract.
