Veronica Jamnik

Veronica Jamnik
York University · School of Kinesiology and Health Sciences

Veronica Jamnik PhD

About

122
Publications
34,330
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
3,330
Citations

Publications

Publications (122)
Article
Objective: Evidence suggests that patients with type 1 diabetes (T1D) performing aerobic exercise with their insulin pump connected (pump on) vs pump disconnected (pump off) have an increased risk of hypoglycemia. It has not been examined whether this risk remains during high-intensity exercise. This study compared the effects of pump on (50% basa...
Article
Full-text available
Background: To assess the post-implementation impact of the Canadian Type 1 Wildland Fire Fighter (WFF) Fitness Test Circuit (WFX-FIT), a retrospective descriptive analysis of anonymized aggregate data collected between 2012-2016 was conducted. Objectives: The objectives were to examine the pass rates of Type 1 WFF in each fire jurisdiction and...
Article
Objective: The purpose of this study was to examine the impact of applying six commonly-used and two proposed resting blood pressure (BP) cut-points to clear individuals for maximal exercise in non-clinical health, wellness, commercial fitness agencies and physically demanding occupation test sites. Methods: Participants (n = 1670) completed the...
Article
Background: The increasing popularity of wearable technology necessitates the evaluation of their accuracy to differentiate physical activity (PA) intensities. These devices may play an integral role in customizing PA interventions for primary prevention and secondary management of chronic diseases. For example, in persons with type 1 diabetes (T1...
Article
Full-text available
Background: Exercise causes glycemic disturbances in individuals with type 1 diabetes (T1D). Continuous moderate-intensity aerobic exercise (CON) generally lowers blood glucose (BG) levels and often leads to hypoglycemia. In comparison, circuit-based exercise (CIRC) may attenuate the drop in BG. The goal of this study is to contrast the effects of...
Article
The “athletic heart,” is characterized by hypertrophy and dilation of the heart, in addition to functional and electrical remodeling. The aim of this study was to provide reference two-dimensional (2DE) and three-dimensional (3DE) echocardiographic measurements in a large database on draft-eligible elite ice hockey players and to determine the freq...
Article
Background: Emerging evidence suggests that oxygen consumption (VO2) for self-paced physical activity (PA) is underestimated when applying laboratory-based treadmill (TM)-derived regression equations. This study examines the accelerometer (ACC) characteristics for paced TM PA and self-paced children's PA to ascertain if the predictable regulated p...
Article
Purpose: Prediabetes is linked to several modifiable risk factors, in particular, physical activity participation. The optimal prescription for physical activity remains uncertain. This pilot study aimed to investigate the effectiveness of continuous moderate intensity (CON) versus high intensity interval (HIIT) aerobic training in persons with pr...
Article
The objective of this study was to explore whether accelerometer thresholds that are adjusted to account for differences in body mass influence discrepancies between self-report and accelerometer-measured physical activity (PA) volume for individuals with overweight and obesity. We analyzed 6164 adults from the National Health and Nutrition Examina...
Article
Objectives: In Canada, an ageing population, obesity rates and high risk among certain ethnocultural populations are driving diabetes prevalence. Given the burden associated with type 2 diabetes and its link to modifiable risk factors, this study aimed to implement culturally preferred physical activities at the community level, targeting individu...
Article
This chapter is designed to provide a summary of the current consensus on evidence-based, best practice guidelines for safe and effective preparticipation screening and risk stratification. We summarize briefly the irrefutable body of evidence supporting the health benefits of routine physical activity/exercise (particularly in the elderly and at-r...
Article
Full-text available
Physical activity has a wide range of effects on glucose concentrations in type 1 diabetes (T1D) depending on the type (ie, aerobic, anaerobic, mixed) and duration of activity performed. This variability in glucose responses to physical activity makes the development of artificial pancreas (AP) systems challenging. Automatic detection of exercise t...
Article
Full-text available
Regular physical activity (PA) promotes numerous health benefits for people living with type 1 diabetes (T1D). However, PA also complicates blood glucose control. Factors affecting blood glucose fluctuations during PA include activity type, intensity and duration as well as the amount of insulin and food in the body at the time of the activity. To...
Article
To determine the effects of acute caffeine ingestion on glycaemia during moderate to vigorous intensity aerobic exercise and in recovery in individuals with Type 1 diabetes. Methods A total of 13 patients with Type 1 diabetes [eight women, five men: mean ± sd age 25.9 ± 8.8 years, BMI 71.9 ± 11.0 kg, maximum oxygen consumption 46.6 ± 12.7 ml/kg/min...
Article
The sport of ice hockey requires coordination of complex skills involving musculoskeletal and physiological abilities while simultaneously exposing players to a high risk for injury. The Functional Movement Screen (FMS) was developed to assess fundamental movement patterns that underlie both sport performance and injury risk. The top one hundred an...
Article
Full-text available
Amidst the growing health care burden created by diabetes, this study aimed to assess the utility of a prediabetes/type 2 diabetes risk questionnaire in high risk ethnic communities in Toronto Canada. Participants (n = 691) provided questionnaire responses and capillary blood tests collected via fingerstick and results were analysed for HbA1c using...
Article
Full-text available
Background: It is unclear whether the common physical activity (PA) intensity descriptors used in PA guidelines worldwide align with the associated percent heart rate maximum method used for prescribing relative PA intensities consistently between sexes, ethnicities, age categories and across body mass index (BMI) classifications. Objectives: Th...
Article
Full-text available
Mutations in mitochondrial (mt) DNA accumulate with age and can result in the generation of neopeptides. Immune surveillance of such neopeptides may allow suboptimal mitochondria to be eliminated, thereby avoiding mt-related diseases, but may also contribute to autoimmunity in susceptible individuals. To date, the direct recognition of neo-mtpeptid...
Article
Inspired by increases in the prevalence and incidence of prediabetes, the Pre-diabetes Detection and Physical Activity Intervention Delivery Project (PRE-PAID) is a multiphasic program that identifies persons at high risk for developing type 2 diabetes, provides an opportunity for culturally appropriate, community-based physical activity and facili...
Article
Full-text available
Tai Chi (TC) has proven to be effective at improving musculoskeletal fitness by increasing upper and lower body strength, low back flexibility and overall physical health. The objectives of this study were to examine changes in musculoskeletal health-related fitness and self-reported physical health after a 16 week TC program in a low income multip...
Article
Full-text available
Habitual physical activity participation is widely accepted to be a safe and effective method for managing cardiovascular and metabolic disease risk factors. However, engagement in physical activity has the potential to trigger cardiovascular events, especially when the activity is of vigorous intensity and the participant is unfit or has pre-exist...
Article
RÉSUMÉ On a démontré que le Tai Chi peut influer positivement sur la condition physique liée à la santé (CLPS) des participants âgés, en leur offrant un moyen d’accoître la force musculo-squelettique. L’objectif de cette étude était d’examiner les effets de l’intervention de Tai Chi sur la forme physique, et de découvrir si ethnies culturellement é...
Article
Full-text available
The article title should read “Physiological employment standards II: developing and implementing physical employment standards for safety-related occupations”.
Article
Full-text available
Background The 2009 pandemic influenza was milder than expected. Based on the apparent lack of pre-existing cross-protective antibodies to the A (H1N1)pdm09 strain, it was hypothesized that pre-existing CD4+ T cellular immunity provided the crucial immunity that led to an attenuation of disease severity. We carried out a pilot scale study by conduc...
Article
Full-text available
Background: A weak relationship exists between obesity and mortality risk in older populations, however, the influence of age on the relationship between obesity and morbidity is unclear. The objective of this study was to determine the influence of age on the relationship between obesity and cardiovascular disease, type 2 diabetes, dyslipidemia,...
Article
Canadian court decisions and human rights legislation impose strict legal criteria for developing applicant and incumbent physiological employment standards to qualify as a bona fide occupational requirement. These legal criteria compel researchers and employers to ensure that the standards are criterion-based and validly linked to the critical lif...
Article
Background: Communication between cardiac rehabilitation (CR) and primary care providers (PCPs) is paramount to promoting long-term risk reduction after the completion of CR. The objectives of this study were to investigate receipt of CR discharge summaries by PCPs, as well as timing, and satisfaction with and perceptions of CR summaries. Methods...
Article
Background: Understanding sudden cardiac death in the young may inform prevention strategies. Objective: To determine the scope and nature of sudden death in a geographically defined population. Methods: We performed a retrospective population-based cohort study in Ontario, Canada, of all sudden cardiac death cases involving persons aged 2-40...
Article
Full-text available
It is unclear whether Canadians accurately estimate serving sizes and the number of servings in their diet as intended by Canada's Food Guide (CFG). The objective of this study was to determine if participants can accurately quantify the size of 1 serving and the number of servings consumed per day. White, Black, South Asian, and East Asian adults...
Article
Full-text available
The purpose of this paper is to provide succinct descriptions of prominent job- specific physical fitness protocols (JSPFPs) which were constructed to satisfy the legal obligations to qualify as a bona fide occupational requirement for physically demanding public safety occupations. The intent of a JSPFP is to determine whether an applicant or incu...
Article
Full-text available
Cardiac rehabilitation (CR) is significantly underutilized. However, physician endorsement promotes greater patient utilization. This study examined perceptions of provider endorsement by patients (1) of sociodemographic groups who are often less represented in CR and by clinical indication and (2) by type of healthcare provider and place of referr...
Article
Full-text available
While it is recommended that records are kept between primary care providers (PCPs) and specialists during patient transitions from hospital to community care, this communication is not currently standardized. We aimed to assess the transmission of cardiac rehabilitation (CR) program intake transition records to PCPs and to explore PCPs' needs in c...
Article
Full-text available
The purpose of this study was to evaluate fitness and health adaptations from a training program riding all-terrain vehicles (ATV) and off-road motorcycles (ORM) as the exercise stimulus. Participants (n = 58) were randomized to a control group (n = 12) or one of four experimental groups; 2 days/week ATV (n = 11), 2 days/ week ORM (n = 12), 4 days/...
Article
Full-text available
The Physical Activity Readiness Questionnaire (PAR-Q) and the Physical Activity Readiness Medical Evaluation (PARmed-X) are internationally renowned and extensively used preparticipation screening tools. However, recent feedback from end-users has identified limitations to the existing PAR-Q and PARmed-X screening process. As such, a systematic eva...
Article
The Physical Activity Readiness Questionnaire (PAR-Q) and the Physical Activity Readiness Medical Evaluation (PARmed-X) are internationally known preparticipation screening tools developed on the basis of expert opinion. The primary purposes of this consensus document were to seek evidence-based support for the PAR-Q and PARmed-X forms, to identify...
Article
Full-text available
Recent feedback from physical activity (PA) participants, fitness professionals, and physicians has indicated that there are limitations to the utility and effectiveness of the existing PAR-Q and PARmed-X screening tools for PA participation. The aim of this study was to have authorities in exercise and chronic disease management to work with an ex...
Article
Global asthma control levels are suboptimal. The influence of regular exercise on asthma control is unclear. We assessed the effects of a 12-week supervised exercise intervention followed by 12 weeks of self-administered exercise on adults with partially controlled asthma (n = 21) and matched controls (n = 15). Assessments were conducted at baselin...
Article
Full-text available
The aims of this study were: (1) to characterize selected fitness and health attributes of two types of habitual recreational off-road vehicle riders - off-road motorcyclists and all-terrain vehicle riders; (2) to explore differences among riders in terms of vehicle type, age, and gender; and (3) to compare the fitness and health of riders to popul...
Article
Supervised exercise leads to significant improvements in asthma control and quality-of-life in adults with partly controlled asthma; however, the role of unsupervised exercise is unknown. The purpose of this study was to determine the impact of self-directed exercise on subjective and objective indices of asthma-related health. Participants (n  = 2...
Article
Full-text available
Lifestyle changes that include a nutritionally balanced diet and increased physical activity (PA) are effective intervention options for persons with prediabetes who want to prevent progression to type 2 diabetes mellitus. Although nutritional counseling is standard practice for patients in a clinical setting, an individualized PA prescription, inc...
Article
Full-text available
The fitness test for correctional officer applicants (FITCO) was constructed a priori to conform to requirements established by the Meiorin Decision of the Supreme Court of Canada. A critical obligation from this decision is to determine whether the FITCO has the potential of adverse impact on any subpopulation of applicants and, if so, whether it...
Article
Full-text available
The purpose of this investigation was to identify the critical tasks encountered by correctional officers (COs) on the job and to conduct a comprehensive assessment and characterization of the physical demands of these tasks. These are the first steps in developing a fitness screening test for COs in compliance with recent legislation. The most imp...
Article
Full-text available
The purpose of this investigation was to develop and validate a fitness test for correctional officer (CO) applicants (FITCO) and to establish associated standards of acceptability. The FITCO incorporated the most important, physically demanding, and frequently occurring tasks of a CO. It consists of (i) a simulated cell search; (ii) an emergency r...
Article
Full-text available
The purpose of this study was to characterize the physiological demands of recreational off-road vehicle riding under typical riding conditions using habitual recreational off-road vehicle riders (n = 128). Comparisons of the physical demands of off-road vehicle riding were made between vehicle types (all-terrain vehicle (ATV) and off-road motorcyc...
Article
Athletes (n = 345) invited to the annual combine conducted by the National Hockey League (NHL) prior to the entry draft were administered tests to measure upper body strength, lower body power, aerobic and anaerobic energy systems, and body composition. Their common variance was extracted using factor analysis from which an overall composite index...
Article
Elite junior hockey players (N=3,675) ranked by Central Scouting Service of the National Hockey League (NHL) prior to the NHL Entry Draft between 1993-2002 were studied to determine whether it is possible to predict their "value" to the team five years later. Using the Sports Performance Index for Hockey (SPI-H), it was found that time on ice (an i...
Article
Full-text available
Workplace computer use has increased dramatically in recent years and has been linked to musculoskeletal disorders, a leading cause of work disability and productivity losses in industrialized nations. Tai Chi is a simple, convenient workplace intervention that may promote musculoskeletal health without special equipment or showering, yet no study...
Article
Full-text available
The range of exercise intensities that elicit high fat oxidation rates (FOR) in youth and the influence of pubertal status on peak FOR are unknown. In a longitudinal design, we compared FOR over a range of exercise intensities in a small cohort of developing prepubertal male subjects. Five boys all at Tanner stage 1 (ages 11-12 yr) and nine men (ag...