Justin Sullivan

Dr. Justin Sullivan

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
18 September 2014 in Foot & Ankle International
Verified
Journal Article
Closed access
JSJustin Sullivan
Justin Sullivan
JBJoshua Burns
Joshua Burns
RARoger Adams
Roger Adams
EPEvangelos Pappas
Evangelos Pappas
JCJack Crosbie
Jack Crosbie
Background: Despite the prevalence and impact of plantar heel pain, its etiology remains poorly understood, and there is no consensus regarding optimum management. The identification of musculoskeletal factors related to the presence of plantar heel pain could lead to the development of better targeted intervention strategies and potentially improve clinical outcomes. The aim of this study was to investigate relationships between a number of musculoskeletal and activity-related measures and plantar heel pain. Methods: In total, 202 people with plantar heel pain and 70 asymptomatic control participants were compared on a variety of musculoskeletal and activity-related measures, including body mass index (BMI), foot and ankle muscle strength, calf endurance, ankle and first metatarsophalangeal (MTP) joint range of motion, foot alignment, occupational standing time, exercise level, and generalized hypermobility. Following a comparison of groups for parity of age, analyses of covariance were performed to detect differences between the 2 groups for any of the variables measured. Results: The plantar heel pain group displayed a higher BMI, reduced ankle dorsiflexion range of motion, reduced ankle evertor and toe flexor strength, and an altered inversion/eversion strength ratio. There were no differences between groups for foot alignment, dorsiflexor or invertor strength, ankle inversion or eversion range of motion, first MTP joint extension range of motion, generalized hypermobility, occupational standing time, or exercise level. Conclusion: Plantar heel pain is associated with higher BMI and reductions in some foot and ankle strength and flexibility measures. Although these factors could be either causal or consequential, they are all potentially modifiable and could be targeted in the management of plantar heel pain. Level of Evidence: Level III, comparative study.

1 February 2015 in Gait & Posture
Verified
Journal Article
Closed access
JSJustin Sullivan
Justin Sullivan
JBJoshua Burns
Joshua Burns
RARoger Adams
Roger Adams
EPEvangelos Pappas
Evangelos Pappas
JCJack Crosbie
Jack Crosbie

22 October 2024 in Journal of Imaging
Verified
Journal Article
Open access
PDF file
MMMarnee McKay
Marnee McKay
KWKenneth Weber
Kenneth Weber
EWEvert O. Wesselink
Evert O. Wesselink
ZSZachary Smith
Zachary Smith
RARebecca Abbott
Rebecca Abbott
JEJames Matthew Elliott
James Matthew Elliott
Disorders affecting the neurological and musculoskeletal systems represent international health priorities. A significant impediment to progress in trials of new therapies is the absence of responsive, objective, and valid outcome measures sensitive to early disease changes. A key finding in individuals with neuromuscular and musculoskeletal disorders is the compositional changes to muscles, evinced by the expression of fatty infiltrates. Quantification of skeletal muscle composition by MRI has emerged as a sensitive marker for the severity of these disorders; however, little is known about the composition of healthy muscles across the lifespan. Knowledge of what is ‘typical’ age-related muscle composition is essential to accurately identify and evaluate what is ‘atypical’. This innovative project, known as the MuscleMap, will achieve the first important steps towards establishing a world-first, normative reference MRI dataset of skeletal muscle composition with the potential to provide valuable insights into various diseases and disorders, ultimately improving patient care and advancing research in the field.

1 January 2015 in Journal of Foot and Ankle Research
Verified
Journal Article
Open access
PDF file
JSJustin Sullivan
Justin Sullivan
EPEvangelos Pappas
Evangelos Pappas
RARoger Adams
Roger Adams
JCJack Crosbie
Jack Crosbie
JBJoshua Burns
Joshua Burns
Background: Plantar heel pain is a common foot disorder aggravated by weight‐bearing activity. Despite considerable focus on therapeutic interventions such as orthoses, there has been limited investigation of footwear‐related issues in people with plantar heel pain. The aim of this study was to investigate whether people with plantar heel pain experience footwear‐related difficulties compared to asymptomatic individuals, as well as identifying factors associated with footwear comfort, fit and choice.Methods: The footwear domain of the Foot Health Status Questionnaire (FHSQ) was assessed in 192 people with plantar heel pain and 69 asymptomatic controls. The plantar heel pain group was also assessed on a variety of measures including: foot posture, foot strength and flexibility, pedobarography and pain level. A univariate analysis of covariance, with age as the covariate, was used to compare the heel pain and control groups on the FHSQ footwear domain score. A multiple regression model was then constructed to investigate factors associated with footwear scores among participants with plantar heel pain.Results: When compared to asymptomatic participants, people with plantar heel pain reported lower FHSQ footwear domain scores (mean difference −24.4; p < 0.001; 95 % CI: −32.0 to −17.0). In the participants with heel pain, footwear scores were associated with maximum force beneath the postero‐lateral heel during barefoot walking, toe flexor strength and gender.Conclusions: People with plantar heel pain experience difficulty with footwear comfort, fit and choice. Reduced heel loading during barefoot walking, toe flexor weakness and female gender are all independently associated with reports of footwear difficulties in people with heel pain. Increased focus, in both clinical and research settings, is needed to address footwear‐related issues in people with plantar heel pain.

28 April 2017 in PM&R
Verified
Journal Article
Closed access
ABAllegra Barnes
Allegra Barnes
JSJustin Sullivan
Justin Sullivan
EPEvangelos Pappas
Evangelos Pappas
RARoger Adams
Roger Adams
JBJoshua Burns
Joshua Burns

11 February 2022 in Health Expectations
Verified
Journal Article
Open access
PDF file
EGEdward Gorgon
Edward Gorgon
KMKatherine Maka
Katherine Maka
AKAndrew Kam
Andrew Kam
GNGillian Nisbet
Gillian Nisbet
JSJustin Sullivan
Justin Sullivan
ALAndrew Leaver
Andrew Leaver
Background: There is a need for effective health service solutions to provide greater structure and support for implementing evidence‐based practice in back pain care. Patient involvement in developing these solutions is crucial to increase relevance, acceptability and uptake.Objectives: To determine patients' perceived needs and barriers to best‐practice back pain care, and potential solutions to better address care needs. The study is the third in a series of needs assessment studies feeding into the ‘idea generation’ for service design in a large teaching hospital in a culturally and linguistically diverse community in metropolitan Sydney, Australia.Design: We conducted a combination of focus groups and in‐depth interviews using an interpretive description approach. We used inductive thematic analysis to identify the main themes.Setting and Participants: We purposively sampled patients with diverse characteristics from the neurosurgery and physiotherapy outpatient clinics, in particular those whose primary language was English, Arabic, Persian or Mandarin. Non‐English audio recordings were translated and transcribed by bilingual researchers.Results: There were 24 participants (focus groups = 9; individual interviews = 15) when data saturation was reached. The analysis identified three key themes with several subthemes around what service designers needed to understand in helping people with back pain in this setting: (1) This is who I am; (2) It's not working for me; and (3) What I think I need.Discussion and Conclusion: This study highlights that perceived unmet needs of patients are underpinned by unhelpful beliefs about the causes of and solutions for back pain, misaligned care expectations, unclear expectations of the hospital role and fragmentations in the health system. To design and implement a service that can deliver better back pain care, several solutions need to be integrated around: developing new resources that challenge unhelpful beliefs and set realistic expectations; improving access to education and self‐management resources; focusing on individualized care; using a collaborative multidisciplinary approach within the hospital; and better connecting with and directing primary health care services.Patient or Public Contribution: A consumer representative of the Western Sydney Local Health District provided input during study conceptualisation and is duly recognized in the Acknowledgements section.