Joseph Hamill

Joseph Hamill
University of Massachusetts Amherst | UMass Amherst · Department of Kinesiology

PhD

About

482
Publications
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16,773
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Publications

Publications (482)
Article
Full-text available
Background Running overuse injuries (ROIs) occur within a complex, partly injury-specific interplay between training loads and extrinsic and intrinsic risk factors. Biomechanical risk factors (BRFs) are related to the individual running style. While BRFs have been reviewed regarding general ROI risk, no systematic review has addressed BRFs for spec...
Conference Paper
Full-text available
Achilles tendon (AT) tendinopathy was reported to be the pathology with one of the highest incidences of all running-related injuries. Non-rearfoot FP has been proposed to be the risk factor for AT overload. T2* relaxation time of Achilles tendon is considered to be a marker of AT tendinopathy. Therefore, the purpose of this study was to compare T2...
Article
Non-technical Summary Bow and arrow technology plays a significant role in the recent evolutionary history of modern humans, but limitations of preservation make it challenging to identify archaeological evidence of early archery. Since bone structure can change in response to muscle force, archers of the past can potentially be identified through...
Article
Running footwear is continuously being modified and improved; however, running-related overuse injury rates remain high. Nevertheless, novel manufacturing processes enable the production of individualized running shoes that can fit the individual needs of runners, with the potential to reduce injury risk. For this reason, it is essential to investi...
Article
The aim of this study was to assess acute effects of footwear conditions (barefoot, minimalist and standard running shoes) on running impact loading in the preschool years. Fourty-eight habitually shod preschool children (26 males and 22 females) were divided into four age groups (3-, 4-, 5- and 6-year-old). Children performed a simple running game...
Article
Head reorientation precedes body reorientation during direction change to facilitate gaze realignment, thus enhancing perceptual awareness. Whole body kinematics are dependent on the available planning time. The purpose of this study was to assess the role of anticipation on head control and head-trunk coordination during sidestepping tasks. Fourte...
Article
Background Coordination variability has been linked to overuse running injuries and has been studied both on a treadmill and over-ground. It is not clear, however, if the coordination variability data from over-ground locomotion can be compared with treadmill locomotion data. Research Question Therefore, the purpose of this study was to compare co...
Preprint
Full-text available
Background Previous research indicated that running barefoot or in minimalist shoes led to lower impact loading in an adolescent and adult population. Running as fundamental locomotor skill significantly develops during early childhood (preschool age). However, no study has focused on effect of footwear condition on lower limb impact loading during...
Article
Full-text available
Inconsistencies between sexes in the landing criteria provided by the international gymnastics governing body (FIG) may predispose female gymnasts to lower extremity injury. This study aimed to investigate lower extremity biomechanics when performing the male and female landing strategy. Seven collegiate, female gymnasts (age: 20.5 ± 1.2 years, hei...
Article
Full-text available
The accurate detection of foot-strike and toe-off is often critical in the assessment of running biomechanics. The gold standard method for step event detection requires force data which are not always available. Although kinematics-based algorithms can also be used, their accuracy and generalisability are limited, often requiring corrections for s...
Article
In the last 40 years, biomechanics has progressed significantly as a subdiscipline within kinesiology. The development of national and international societies dedicated to biomechanics and the increase in the number of scientific biomechanics journals has led to a growth in the biomechanics community. In the last few decades, the research focus in...
Article
This study investigated the differences between 5 commonly used methods to calculate leg stiffness over a range of running velocities. Thirteen male, habitually rearfoot, recreational runners ran on a force instrumented treadmill for a 5-minute running session. Each session consisted of 30-second intervals at 6 progressively faster speeds from 2.5...
Preprint
Objective To identify and evaluate the evidence of the most relevant running-related risk factors (RRRFs) for running-related overuse injuries (ROIs) and to suggest future research directions. Design Systematic review considering prospective and retrospective studies. (PROSPERO_ID: 236832) Data sources Pubmed. Connected Papers. The search was perfo...
Article
Introduction Modifications of midsole geometry and material properties are essential footwear design features to prevent overuse injuries (OIs) in distance running. With an injury frequency of 10.9%, Achilles tendinopathy (AT) is one of the most common OIs (Lopes et al., 2012). The occurrence of AT is generally associated with the amount and the du...
Article
Background It is commonly assumed that abnormal foot biomechanics cause plantar fasciitis; however, this assumption is not well supported. In this study, we investigated rearfoot to medial-forefoot coordination of healthy and plantar fasciitis individuals. We hypothesized that chronic plantar fasciitis individuals would exhibit greater intersegment...
Article
Full-text available
Coordination variability (CV) is commonly analyzed to understand dynamical qualities of human locomotion. The purpose of this study was to develop guidelines for the number of trials required to inform the calculation of a stable mean lower limb CV during overground locomotion. Three-dimensional lower limb kinematics were captured for 10 recreation...
Article
In our prior studies, participants walked and grasped a dowel using an anticipatory mode of control. However, it is unknown how this combined task would change in a less predictable environment. We investigated the online control aspects involved in the combined task of walking and grasping under different coordination patterns between upper- and l...
Article
The aim of the present study was to investigate the variation of lower-limb kinematic characteristics and movement patterns in elite taekwondo competitors when performing roundhouse kicks at various attack angles. Nineteen male elite athletes specialising in roundhouse kicks were asked to kick a target at 90°, 60°, and 30°. A three-dimensional (3D)...
Article
Full-text available
In large cohort studies, due to the time-consuming nature of the measurement of movement biomechanics, more than one evaluator needs to be involved. This may increase the potential occurrence of error due to inaccurate positioning of markers to the anatomical locations. The purpose of this study was to determine the reliability and objectivity of l...
Preprint
Full-text available
The accurate detection of foot-strike and toe-off is often critical in the assessment of running biomechanics. The gold standard method for step event detection requires force data which are not always available. Although kinematics-based algorithms can also be used, their accuracy and generalisability are limited, often requiring corrections for s...
Article
Introduction: Running skill develops during the pre-school age. There is little research evidence as to how footstrike patterns are affected by footwear during this important developmental period. Purpose: The aim of this study was to compare footstrike patterns among different age groups of preschool children running in different footwear conditi...
Article
Quantifying the midsole material characteristics of athletic footwear is a standard task in footwear research and development. Current material testing protocols primarily focus on the determination of cushioning properties of the heel region or the quantification of the midsole properties as one assembly. However, midsoles possess different spatia...
Article
Full-text available
Far too little attention has been paid to health effects of air pollution and physical (in)activity on musculoskeletal health. The purpose of the Healthy aging in industrial environment study (4HAIE) is to investigate the potential impact of physical activity in highly polluted air on musculoskeletal health. A total of 1500 active runners and inact...
Article
Full-text available
Tibial stress fractures are a problematic injury amongst 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 st...
Conference Paper
The design of products related to space life systems usually involves consideration of several main requirements or objectives sometimes with multidisciplinary facets. Examples of such a diverse set of requirements includes comfort, facilitating human performance, maintaining an oxygen environment, resistance to extreme temperatures, strength, long...
Article
Full-text available
The purpose of this study was to compare lower extremity coordination variability between runners with history of Achilles tendon rupture and healthy controls. Twenty participants, 10 Achilles tendons repaired and 10 controls, were recruited. The groups were matched according to age, sex, volume of running, speed, body mass, height, and footfall ty...
Article
Golf putting requires accuracy and precision. However, environmental factors can influence the accuracy and stability of the putt. Therefore, the purpose of this study was to investigate the adjustment and stabilization strategies of elite college golfers putting under different wind conditions. A 3 D motion analysis system and two force plates wer...
Article
The purpose of this study was to identify changes in segment/joint coordination and coordination variability in running with increasing head stability requirements. Fifteen strides from twelve recreational runners while running on a treadmill at their preferred speed were collected. Head stability demands were manipulated through real-time visual f...
Conference Paper
Full-text available
The aim of this study was to compare the footfall pattern (FP) in different age groups of preschool children while they ran in standard running shoes (SRS) and barefoot. Forty-eight children aged 3-6 years participated in the study and were split into 4 age groups (n=12). All children performed a simple running game (based on the shuffle run) in SR...
Conference Paper
Full-text available
The purpose of this study was to describe the relationship between Achilles tendon dimensions and foot strike index in rearfoot and non-rearfoot runners. 107 recreational runners were divided into a group of rearfoot (n = 88) and a group of non-rearfoot runners (n = 19). Achilles tendon dimensions were measured by a combination of ultrasonography i...
Conference Paper
Full-text available
This study aimed to quantify the mechanical characteristics of two landing techniques performed by artistic gymnasts. Seven senior female artistic gymnasts performed 20 drop landings with different foot positions: feet together (women's technique) or hip width apart (men's technique). Synchronised 3D kinematic (250 Hz) and kinetic data (1000 Hz) we...
Article
The lateral tilt of the arms accompanied by trunk lateral tilt is a typical blocking manoeuvre in volleyball. However, during this unanticipated blocking movement, an associated risk of ACL injury may result. The aim of the present study was to compare associative ACL risk factors at the initial contact and the first and second peak of VGRF during...
Article
Introduction: The purpose of this study was to compare leg, sagittal plane knee and ankle and and frontal plane ankle stiffness over the course of a prolonged treadmill run in neutral and stability footwear. Methods: Thirteen male habitual rearfoot runners completed two biomechanical testing sessions in which they ran for 21 minutes at their pre...
Article
We compared the effect of visual information on the dominant upper limb position sense of children with diplegic cerebral palsy (n = 10) and normally developing children (n = 10). An isokinetic dynamometer passively moved the dominant forearm in 120° of elbow flexion/extension until the volunteers stopped the machine to indicate that the elbow join...
Article
Full-text available
The purpose of this project was to develop a system that could estimate impact force in tennis forehand stroke. Such estimation is critical feedback during training. Method: A tennis racket was used for this study. A strain gauge was embedded into the body of the racket. Changes in strain measurement (analogue signal) was converted to digital signa...
Article
Full-text available
Perception and action are coupled such that information from the perceptual system is related to the dynamics of action in order to regulate behavior adaptively. Using running as a model of a cyclic behavior, this coupling involves a continuous, cyclic relationship between the runner’s perception of the environment and the necessary adjustments of...
Article
This study investigated differences in joint loading during a side-step manoeuvre on artificial grass turfs with different infill depths. The kinematics and kinetics of 17 trained male inter-college soccer players performing the manoeuvre were captured using 10 high-speed optical cameras synchronised to a force-platform at sampling frequencies of 2...
Article
Objective Vector coding is a non-linear data analysis technique that quantifies inter-segmental coordination and coordination variability. The traditional approach of reporting time-series data from vector coding can be problematic when overlaying multiple trials on the same illustration. The objective of this study was to describe and present nove...
Article
Full-text available
The aim of this study was to investigate knee intra‐articular cartilage volume changes after a prolonged running bout in three footwear conditions. Twelve participants performed 75‐minute running bouts in the three footwear conditions. Before and after each running bout, MRI scans were obtained using a high‐resolution 3.0 Tesla MRI. Three‐dimension...
Article
Willwacher, S, Fischer, KM, Rohr, E, Trudeau, MB, Hamill, J, and Brüggemann, G-P. Surface stiffness and footwear affect the loading stimulus for lower extremity muscles when running. J Strength Cond Res XX(X): 000-000, 2020-Running in minimal footwear or barefoot can improve foot muscle strength. Muscles spanning the foot and ankle joints have the...
Article
Full-text available
The habitual motion path theory predicts that humans tend to maintain their habitual motion path (HMP) during locomotion. The HMP is the path of least resistance of the joints defined by an individual’s musculoskeletal anatomy and passive tissue properties. Here we tested whether participants with higher HMP deviation and whether using footwear tha...
Article
The purpose of this study was to investigate changes in coordination variability (CV) over the course of a prolonged treadmill run and the influence of stability and neutral footwear on CV. Fourteen male habitually rearfoot runners completed two 42 minute prolonged running sessions while three dimensional kinematics and kinetics were recorded. Duri...
Article
Over the past decades, pronation has been discussed as a potential risk factor for injuries or as the mechanism behind impact damping. However, little is understood about pronation. The objectives of this paper were to (a) define and differentiate between the terms of pronation and eversion, (b + c) underline the importance and problematic aspects...
Article
Full-text available
The current literature on footwear cushioning and pronation has suggested that there may not be a relationship between chronic injury risk and these parameters based on mixed findings and lack of evidence of an association with prospective injury rates. Since footwear has been designed and developed based on cushioning and pronation, we suggest tha...
Article
Purpose The purpose of this study was to compare kinetics, kinematics and muscle activation strategies between male and female collegiate level athletes during unanticipated sidestepping tasks to further the understanding of sex-specific differences in injury incidence and their potential influence on ACL injury risk. Methods Three-dimensional kin...
Article
Recently, there has been an increasing amount of literature dealing with new methods of Achilles tendon (AT) length measurement. However, most of these studies measured the AT length between the calcaneus and medial head of the gastrocnemius and the reliability of such a measurement has not been satisfactorily presented. The purpose of this study w...
Article
Full-text available
The purpose of this study was to investigate the influence of sex and planning time on spatial and temporal aspects of the whole-body centre of mass (CoM) mechanics during sidestepping performance. Seventeen female and 17 male collegiate team sport athletes completed seven anticipated and seven unanticipated sidestep trials during which three-dimen...
Conference Paper
Full-text available
The effects of filtering strategies and footwear on internal knee abduction moments in running
Article
Introduction: Stress fractures of the tibia are a problematic injury among runners of all levels. Quantifying tibial stress using a modeling approach provides an alternative to invasive assessments that may be used to detect changes in tibial stress during running. This study aimed to assess the repeatability of a tibial stress model and to use th...
Article
Introduction: In response to fatigue during an exhaustive treadmill run, forefoot runner’s muscles must adapt to maintain their pace. From a neuromuscular control perspective, certain muscles may not be able to sustain the force to meet the run’s demands; thus, there may be alternative muscle coordination in the lower extremity that allows for cont...
Article
The effect of maximal isolated muscle and cardiovascular fatigue on lower extremity biomechanics during running has been investigated extensively. However, the majority of runners do not run to exhaustion regularly. Consequently, research and industry are interested in biomechanical changes over the course of a typical prolonged run and how footwea...
Article
Full-text available
Background: Anterior Knee Pain (AKP) during running has been partially attributed to lower-limb kinematics. Mechanical deviances from asymptomatic cohorts at the hip, knee, shank and foot have been reported for joints and segments in isolation. Appraisal of lower-limb coordination and its variability may provide important insight into the role of p...
Article
Fractionated reaction time can be used to determine distinct epochs known as pre-motor, response and movement times (MTs) of a reaction time task. The purpose of this study was to compare elite and novice athletes performing a taekwondo kick in terms of the fractionated reaction time and electromyography (EMG) activation patterns of the muscles of...
Preprint
Full-text available
Forefoot running is advocated to improve running economy because of increased elastic energy storage than rearfoot running. This claim has not been assessed with methods that predict the elastic energy contribution to positive work or estimate muscle metabolic cost. The purpose of this study was to compare the mechanical work and metabolic cost of...
Article
The present study aimed to use a Support Vector Machine (SVM) algorithm to identify and classify shod and barefoot running as well as rearfoot and forefoot landings. Ten habitually shod runners ran at self-selected speed. Thigh and leg muscle surface electromyography (EMG) were recorded. Discrete Wavelet transformation (DWT) and Fast Fourier transf...
Conference Paper
Full-text available
The traditional approach of reporting time-series data on outcome measures from a modified vector coding technique can be problematic when overlaying multiple trials on the same illustration. The purpose of this study was to provides researchers the prospect to inspect an entire dataset and to compare data across multiple participants and experimen...