Kym J. Guelfi

ORCID: 0000-0003-0412-8901
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About
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Research Areas
  • Obesity, Physical Activity, Diet
  • Muscle metabolism and nutrition
  • Eating Disorders and Behaviors
  • Gestational Diabetes Research and Management
  • Cardiovascular and exercise physiology
  • Sports Performance and Training
  • Exercise and Physiological Responses
  • Regulation of Appetite and Obesity
  • Physical Activity and Health
  • Diabetes Management and Research
  • Behavioral Health and Interventions
  • Diet and metabolism studies
  • Dietary Effects on Health
  • Bariatric Surgery and Outcomes
  • Health and Lifestyle Studies
  • Adipose Tissue and Metabolism
  • Circadian rhythm and melatonin
  • Pregnancy and preeclampsia studies
  • Pharmacology and Obesity Treatment
  • Sports injuries and prevention
  • Children's Physical and Motor Development
  • Birth, Development, and Health
  • Biochemical Analysis and Sensing Techniques
  • Heart Rate Variability and Autonomic Control
  • Sleep and related disorders

The University of Western Australia
2014-2024

University of Missouri
2020

Murdoch University
2020

Avenir Health
2020

Committee on Publication Ethics
2014-2017

King's College London
2016

Queen Mary University of London
2016

Imperial College London
2016

Center for Health, Exercise and Sport Sciences
2008-2015

The University of Notre Dame Australia
2007

OBJECTIVE—To compare the response of blood glucose levels to intermittent high-intensity exercise (IHE) and moderate-intensity (MOD) in individuals with type 1 diabetes. RESEARCH DESIGN AND METHODS—Seven healthy diabetes were tested on two separate occasions, during which either a 30-min MOD or IHE protocol was performed. consisted continuous at 40% Vo2peak, while involved combination Vo2peak interspersed 4-s sprints performed every 2 min simulate activity patterns team sports. RESULTS—Both...

10.2337/diacare.28.6.1289 article EN Diabetes Care 2005-06-01

Abstract Aims To investigate whether very‐low‐carbohydrate high‐fat diets, typical of ketogenic can improve glycaemic control without causing any ill health effects in adults with Type 1 diabetes. Methods In this observational study, 11 diabetes (seven men, four women, mean ± sd age 36.1± 6.8 years, duration 12.8 10.3 years), who followed a diet (< 55 g carbohydrate per day) for 2.6 3.3 years (β‐hydroxybutyrate 1.6 1.3 mmol/l), underwent sampling and analysis fasting blood, were fitted...

10.1111/dme.13663 article EN Diabetic Medicine 2018-05-08

Previously, the decline in glycemia individuals with type 1 diabetes has been shown to be less intermittent high-intensity exercise (IHE) compared continuous moderate-intensity (MOD) despite performance of a greater amount total work. The purpose present study was determine whether this lesser can attributed increment endogenous glucose production (R ) or attenuated utilization d ). Nine were tested on two separate occasions, during which either 30-min MOD IHE protocol performed under...

10.1152/ajpendo.00533.2006 article EN AJP Endocrinology and Metabolism 2007-03-01

Previous research has shown that resistance and aerobic exercise have differing effects on perceived hunger circulating levels of appetite-related hormones. However, the effect actual energy intake never been compared. This study investigated an acute bout exercise, compared with subsequent appetite-regulating Ten active men completed 3 trials in a counterbalanced design: 45 min (RES; free machine weights), (AER; running), or resting control trial (CON). Following CON, participants had...

10.1139/h11-121 article EN Applied Physiology Nutrition and Metabolism 2011-12-01

Regular maternal exercise may play an important role in the management of gestational diabetes mellitus (GDM), yet specific guidelines to achieve glycemic control have not been established. Furthermore, many women remain sedentary during pregnancy because perceived barriers participation. This study examined effectiveness a home-based cycling program commenced upon diagnosis GDM on daily fasting and postprandial blood glucose levels, glycosylated hemoglobin (HbA1c), response insulin 75-g...

10.1249/mss.0000000000000302 article EN Medicine & Science in Sports & Exercise 2014-02-11

First-time mothers commonly experience stress and depressive symptoms in the postpartum period. Maternal self-efficacy has been shown to be an important protective factor against these experiences; however, research on dynamic nature of stress, symptoms, maternal is limited. The aim this study was document changes psychological factors among first-time mothers, determine how early perceptions may predict change over first 6 months postpartum.Sixty Australian were recruited during their third...

10.1111/aphw.12147 article EN Applied Psychology Health and Well-Being 2018-10-21

An acute bout of high-intensity intermittent exercise suppresses ad libitum energy intake at the postexercise meal. The present study examined effects 12 wk training (HIIT) compared with moderate-intensity continuous (MICT) on appetite regulation.Thirty overweight inactive men (body mass index, 27.2 ± 1.3 kg·m(-2); V˙O2peak, 35.3 5.3 mL·kg(-1)·min(-1) were randomized to either HIIT or MICT (involving training, three sessions per week) a control group (CON) (n = 10 group). Ad from laboratory...

10.1249/mss.0000000000000687 article EN Medicine & Science in Sports & Exercise 2015-04-22

Despite the acknowledgment of exercise as a cornerstone in management type 2 diabetes (T2D), importance timing has only recently been considered.This study sought to determine effect diurnal on glycemic control individuals enrolled 12-wk supervised multimodal training program. A secondary aim was circadian rhythm wrist skin temperature.Forty sedentary, overweight adults (mean ± SD, age = 51 13 yr; body mass index 30.9 4.2 kg·m; women, n 23) with and without (n 20) T2D diagnosis were randomly...

10.1249/mss.0000000000002139 article EN Medicine & Science in Sports & Exercise 2019-09-02

To investigate the effect of a supervised home-based exercise program on recurrence and severity gestational diabetes mellitus (GDM) together with other aspects maternal health obstetric neonatal outcomes.This randomized controlled trial allocated women history GDM to an intervention (14-week stationary cycling program) or control group (standard care) at 13±1 weeks gestation. The primary outcome was diagnosis GDM. Secondary outcomes included fitness, psychological well-being, outcomes. A...

10.1097/aog.0000000000001632 article EN Obstetrics and Gynecology 2016-09-07

Purpose: To examine the effects of static stretching during recovery periods field-based team sports on subsequent repeated sprint ability (RSA) and change direction speed (CODS) performance. Methods: On four separate occasions, 12 male team-sport players performed a standardized warm-up, followed by test either RSA or CODS (on two occasions each) in counterbalanced design. Both tests involved three sets six maximal repetitions, with 4-min between sets. During break sets, participants rested...

10.1249/mss.0b013e3181867b95 article EN Medicine & Science in Sports & Exercise 2009-02-01

The effect of duration-matched concurrent exercise training (CET) (50% resistance [RET] and 50% endurance [EET] training) on physiological outcomes in untrained, middle-aged men remains to be elucidated.Forty-seven (48.1±6.8y;30.4±4.1kg•m 2 ) were randomized into 12-wks EET (40-60min cycling), RET (10 exercises; 3-4 sets×8-10 repetitions), CET serial completion EET) or control condition.Intervention-based changes fitness strength; abdominal visceral adipose tissue (VAT), total body fat...

10.1139/apnm-2012-0443 article EN Applied Physiology Nutrition and Metabolism 2013-02-25

Studies have reported that rinsing the mouth with a carbohydrate (CHO) solution improves cycling time-trial performance compared placebo solution. However, no studies effect of no-mouth-rinse control condition. The aim this study was to compare effects CHO rinse those and no-rinse Ten male cyclists completed three 1,000-kJ time trials in randomized, counterbalanced order. At every 12.5% trial completed, participants were required their mouths for 5 s either 6.4% maltodextrin (CHO), water...

10.1123/ijsnem.23.1.48 article EN International Journal of Sport Nutrition and Exercise Metabolism 2013-02-01

Despite the well-established benefits of exercise during pregnancy, many women remain inactive. This may be related, in part, to women's beliefs about which are likely influenced by cultural background. Accordingly, aim this study was compare attitudes, subjective norms, and perceived behavioural control toward exercise, together with current levels participation between Chinese Australian pregnancy. A second determine extent these factors predict intention within a Theory Planned Behaviour...

10.1186/s12884-015-0734-6 article EN cc-by BMC Pregnancy and Childbirth 2015-12-01

Exercise is generally recommended for individuals with type 1 diabetes because it associated numerous physiological (1,2) and psychological (3,4) benefits. However, participation in exercise can also increase the risk of experiencing severe hypoglycemia, during both (5) recovery (6). Unfortunately, there are no evidence-based guidelines safe intermittent high-intensity (IHE), which characterizes most team field sports, manual labor occupations, spontaneous play children. This response blood...

10.2337/diacare.28.2.416 article EN Diabetes Care 2005-02-01

Purpose The purpose of the study was to determine effect a home-based cycling program for women with recent diagnosis gestational diabetes mellitus (GDM) on aerobic fitness, weight gain, self-reported mobility, attitude, and intentions toward maternal exercise, obstetric neonatal outcomes. Methods Forty (mean ± SD, 28.8 0.9-wk gestation) were randomized either supervised, exercise program, combining continuous steady-state interval at various intensities, in combination unsupervised moderate...

10.1249/mss.0000000000000587 article EN Medicine & Science in Sports & Exercise 2014-11-20
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