Crystal O. Kean

• PhD (Rehabilitation Sciences)
• Lecturer at Central Queensland University

Objective To investigate the effects of multidirectional elastic tape on pain and function in individuals with lateral elbow tendinopathy. Study Design Randomised crossover trial. Setting Biomechanics laboratory. Subjects 27 participants (11 females, mean (SD) age: 48.6 (11.9) years) with clinically diagnosed lateral elbow tendinopathy of at lea...

Background Lateral elbow tendinopathy is associated with changes to forearm muscle activity and wrist posture during gripping. Multidirectional elastic tape is thought to exert a deloading effect on underlying musculotendinous structures, which could potentially alter muscle activity or wrist posture. Methods This single-blinded randomised crossov...

Background Foot orthoses (FOs) are used to manage foot pathologies such as plantar fasciopathy. 3D printed custom-made FOs are increasingly being manufactured. Although these 3D-printed FOs look like traditionally heat-moulded FOs, there are few studies comparing FOs made using these two different manufacturing processes. Research question How eff...

Accuracy and test-retest reliability were assessed for two devices, PUSH Band 2.0 (PUSH) and Speed4lifts. Two identical sessions were performed 6-8 days apart. Twenty rugby league players performed three repetitions with 20%, 40%, 60% and 80% of estimated one repetition maximum for back squat (BS), front squat (FS), and bench press (BP). Velocity w...

Background: Pain-free grip strength is an important outcome measure in lateral elbow tendinopathy (LET); yet, the reliability and minimum detectable change (MDC) in functional positions are unknown. Purpose: The purpose of this study is to examine the between- and within-session pain-free grip strength reliability and MDC in LET. Methods: Twen...

Background: Custom-made foot orthoses (FOs) play an integral part in managing foot disorders. Traditional FO fabrication is time-consuming and labor intensive. Three-dimensional (3D) printed FOs save time and cost compared with the traditional manufacturing process. To date, the differences in dimensions and comfort perception of these orthoses ha...

Objective: The aim of this study was to investigate whether there is evidence of bilateral upper limb strength deficits in individuals with unilateral lateral elbow tendinopathy (LET). Methods: The electronic databases Medline via Ovid, PubMed, and Scopus were searched from inception to March 2020. Included studies encompassed maximal strength o...

Elsworthy, N, Callaghan, DE, Scanlan, AT, Kertesz, AHM, Kean, CO, Dascombe, BJ, and Guy, JH. Validity and reliability of using load-velocity relationship profiles to establish back squat 1 m·s load. J Strength Cond Res XX(X): 000-000, 2020-Although measuring movement velocity during resistance exercise is being increasingly used to monitor player r...

Objectives Back squat mean concentric velocity (MV) and countermovement jump (CMJ) performance were examined in sub-elite rugby league players post-match to monitor changes in neuromuscular status (NMS) from baseline. Relationships between changes in back squat MV and CMJ performance variables were used to compare back squat MV to an established me...

Background In 1872, Eadweard Muybridge was hired to research unsupported transit in horses, i.e. the trot and the gallop. This research was the first instance of the use of photography to analyse movement and was the ultimate precursor to motion capture for biomechanical assessment of movement utilised today. With the expansion of the field continu...

Background Lateral elbow tendinopathy is associated with pain during gripping, with forearm/wrist orthoses prescribed for treatment. Objectives To investigate the immediate effects of forearm and/or wrist orthoses on outcome measures of pain and function in individuals with lateral elbow tendinopathy. Design Systematic review Methods Four electr...

Background Lateral elbow tendinopathy (LET) is a common musculoskeletal condition that can be treated with therapeutic tape. However, little is known of taping practices for LET in a clinical setting. Objectives To examine Australian healthcare practitioners’ taping techniques, clinical reasoning, and information sources regarding therapeutic tape...

Objective: To systematically identify, appraise, and examine evidence regarding the effects of therapeutic tape on pain and function in individuals with lateral epicondylalgia (LE). Methods: Five electronic databases were systematically searched up to March 2018. Full-text, peer-reviewed, English-language studies were included if they had an LE...

Extensive investigations over the recent decades have established the anatomical, biomechanical and functional importance of the meniscus in the knee joint. As a functioning part of the joint, it serves to prevent the deterioration of articular cartilage and subsequent osteoarthritis. To this end, meniscus repair and regeneration is of particular i...

The aims of this review were to collate the existing literature encompassing heart rate (HR) monitoring in basketball to: (i) identify the applications of HR measurement; (ii) report HR responses in male and female players during training and game-play; (iii) evaluate use of current HR-based training load models; and (iv) provide recommendations fo...

Berkelmans, DM, Dalbo, VJ, Fox, JL, Stanton, R, Kean, CO, Giamarelos, KE, Teramoto, M, and Scanlan, AT. Influence of different methods to determine maximum heart rate on training load outcomes in basketball players. J Strength Cond Res 32(11): 3177-3185, 2018-The summated-heart-rate-zones (SHRZ) approach uses heart rate (HR) responses relative to m...

Extensive investigations over the recent decades have established the anatomical, biomechanical and functional importance of the meniscus in the knee joint. As a functioning part of the joint, it serves to prevent the deterioration of articular cartilage and subsequent osteoarthritis. To this end, meniscus repair and regeneration is of particular i...

Extensive investigations over the recent decades have established the anatomical, biomechanical and functional importance of the meniscus in the knee joint. As a functioning part of the joint, it serves to prevent the deterioration of articular cartilage and subsequent osteoarthritis. To this end, meniscus repair and regeneration is of particular i...

This study quantified lower-limb strength decrements and assessed the relationships between strength decrements and performance fatigue during simulated basketball. Ten adolescent, male basketball players completed a circuit-based, basketball simulation. Sprint and jump performance were assessed during each circuit, with knee flexion and extension...

The primary objective was to examine mechanisms behind previously observed changes in the knee adduction moment (KAM) with rocker-soled shoes, in participants sub-grouped according to whether they experienced an immediate decrease, or increase, in peak KAM. In subgroups where frontal plane knee ground reaction force (GRF) lever-arm emerged as a sig...

Background: Greater impact loading at initial contact is postulated to play a role in the progression of osteoarthritis. Quadriceps weakness is common in individuals with knee osteoarthritis and may contribute to high impact loading. The purpose of this study was to examine the effects of quadriceps strengthening on impact loading parameters. Met...

Background: Despite the growing popularity of Ultimate Frisbee (UF) across sexes, the game demands imposed on players have been predominately examined in males. This study aimed to compare the internal and external demands of UF game-play in males and females. Methods: Male (N = 10) and female (N = 10) recreational UF players competed in separat...

Objectives: Smartphone applications are increasingly used by researchers, coaches, athletes and clinicians. The aim of this study was to examine the concurrent validity and intra-rater reliability of the smartphone-based application, MyJump, against laboratory-based force plate measurements. Design: Cross sectional study. Methods: Participants...

Hip osteoarthritis (OA) is often associated with pain and impaired function. Understanding biomechanical alterations in patients with hip OA during challenging activities such as stair use is important to inform treatments. The aim of this study was to determine whether kinematics and kinetics during stair ambulation differed between people with hi...

Cricket is a popular, international team sport with various game formats ranging from long duration multi-day tests to short duration Twenty20 game-play. The role of batsmen is critical to all game formats with differing physiological demands imposed during each format. Investigation of the physiological demands imposed during cricket batting has h...

Introduction and aims: Increasing participation in Ultimate Frisbee (UF) across genders underscore the growing popularity of this sport at recreational and competitive levels. However, the demands imposed on players during UF are not well understood. Therefore, this study aimed to examine and compare the internal and external responses of male and...

Objective: To explore 1) patients' knowledge and beliefs about osteoarthritis (OA) and OA risk following anterior cruciate ligament (ACL) injury, 2) extent to which information about these risks is provided by health professionals, and 3) associations amongst participant characteristics, knowledge and risk beliefs and health professional advice. M...

Background Concomitant high tibial osteotomy (HTO) and anterior cruciate ligament (ACL) reconstruction is a combined surgical procedure intended to improve kinematics and kinetics in the unstable ACL-deficient knee with varus malalignment and medial compartment knee osteoarthritis (OA). Purpose To investigate 5-year changes in gait biomechanics as...

My Jump Health and Fitness iOS 7.0 or later; Optimised for iPhone 5, iPhone 6 and iPhone 6 Plus. Compatible with iPhone, iPad and iPod touch. $A7.49 Current version is V.2.1 which has iPhone 6 and iPhone 6 Plus support, and iOS8 support. No trial version is available. Vertical jump is a widely used measure of functional performance in athleti...

Alterations in hip abductor strength and hip and knee adduction moments during gait are associated with knee osteoarthritis. This study examines the relationship between hip abductor strength and hip and knee adduction moments during gait in individuals with symptomatic medial knee osteoarthritis. Ninety-nine participants underwent maximal isometri...

The aims of this study were to describe the physiological and fatigue responses associated with indoor Ultimate Frisbee game-play; compare exercise intensities attained to current activity guidelines; and compare responses between male and mixed-gender game formats. A between-subjects (game format) repeated measures (time points) observational expe...

Background: It is unclear whether participation in a randomized controlled trial (RCT), irrespective of assigned treatment, is harmful or beneficial to participants. We compared outcomes for patients with the same diagnoses who did (“insiders”) and did not (“outsiders”) enter RCTs, without regard to the specific therapies received for their respect...

Purpose: This study evaluated the immediate effects of rocker-soled shoes on parameters of the knee adduction moment (KAM) and pain in individuals with knee osteoarthritis (OA). Methods: Three-dimensional gait analysis was performed on 30 individuals (mean (SD): age, 61 (7) yr; 15 (50%) male) with radiographic and symptomatic knee OA under three...

The objective of this study was to examine mechanisms underpinning the reduction in knee adduction moment (KAM) and changes in frontal plane knee-ground reaction force (GRF) lever arm with a modified shoe that incorporates both a variable-stiffness sole and lateral wedging. Thirty individuals with symptomatic knee osteoarthritis (OA) and 30 overwei...

Objective: To evaluate the effects of a modified shoe that incorporates both lateral wedging and a variable-stiffness sole on knee joint loading in 3 populations: individuals with symptomatic and radiographic knee osteoarthritis (OA), asymptomatic overweight individuals, and asymptomatic healthy weight individuals. Methods: Ninety participants (...

To determine whether the method of disease severity measurement influences the magnitude of knee extensor force deficits in knee osteoarthritis (OA). Data from the Osteoarthritis Initiative (n = 659) were analyzed. Knee extensor force was assessed with isometric contractions. Clinical severity was measured with the Western Ontario and McMaster Univ...

The Effects of Unstable Rocker-Soled Shoes on Knee Load in Osteoarthritis.

The peak knee adduction moment is a valid proxy for medial knee joint loading. However as it only measures load at one instance of stance, knee adduction moment impulse, a measure that takes into account both the magnitude and duration of the stance phase, may provide more comprehensive information. This study directly compared the abilities of pea...

Prospective cohort with historical controls. To examine the effects of a 12-week preoperative high-intensity resistance training program on postoperative outcomes. The primary goals of high tibial osteotomy (HTO) are to decrease pain and improve overall function during activities of daily living and participation in sport and recreation in relative...

To date, studies directly comparing the rerupture rate in patients with an Achilles tendon rupture who are treated with surgical repair with the rate in patients treated nonoperatively have been inconclusive but the pooled relative risk of rerupture favored surgical repair. In all but one study, the limb was immobilized for six to eight weeks. Publ...

To examine the test-retest reliability and quantify the minimal detectable change (MDC) in quadriceps strength and voluntary activation in patients with knee osteoarthritis (OA). Repeated measures over a 1-week interval. Tertiary care center. A convenience sample of patients (N=20) diagnosed with knee OA. Isokinetic and isometric quadriceps strengt...

To examine the interaction and relative contributions of frontal plane alignment and body mass on dynamic knee joint loading in patients with knee osteoarthritis (OA). We completed three-dimensional gait analyses and hip-to-ankle standing anteroposterior radiographs on 487 patients with knee OA referred to a tertiary care center specializing in ort...

To evaluate the effects of simultaneous high tibial osteotomy (HTO) and anterior cruciate ligament (ACL) reconstruction on 1) the external knee adduction moment, 2) the external knee flexion and extension moments, and 3) the quadriceps, hamstrings, and gastrocnemius muscle activity during walking. Twenty-one patients with varus malalignment of the...

1) To evaluate the effects of a 12-wk high-intensity knee extensor and flexor resistance training program on strength, pain, and adherence in patients with advanced knee osteoarthritis and varus malalignment and 2) to generate pilot data for change in dynamic knee joint load, patent-reported outcomes, and self-efficacy after training. Fourteen pati...

Background. The Disability Tax Credit (DTC) Certification is an assessment tool used to provide Canadians with disability tax relief. The International Classification of Functioning, Disability and Health (ICF) provides a universal framework for defining disability. Purpose. The purpose of this study was to evaluate the DTC and familiarize occupati...

Background. The Disability Tax Credit (DTC) Certification is an assessment tool used to provide Canadians with disability tax relief. The International Classification of Functioning, Disability and Health (ICF) provides a universal framework for defining disability. Purpose. The purpose of this study was to evaluate the DTC and familiarize occupati...

The Disability Tax Credit (DTC) Certification is an assessment tool used to provide Canadians with disability tax relief The International Classification of Functioning, Disability and Health (ICF) provides a universal framework for defining disability. The purpose of this study was to evaluate the DTC and familiarize occupational therapists with t...

The objective of this study was to determine the effects of fixed foot and functionally directed balance training on static balance time, muscle activation during landing, vertical jump height and sprint time. Twenty-four recreationally active females were tested pre-and post-training (fixed foot balance training, n= 11, functionally directed balan...

The objective of this study was to determine the effects of fixed foot and functionally directed balance training on static balance time, muscle activation during landing, vertical jump height and sprint time. Twenty-four recreationally active females were tested pre- and post-training (fixed foot balance training, n= 11, functionally directed bala...