Janine C Malcolm

Learn More
OBJECTIVE To examine the association between duration and type of screen time (TV, video games, computer time) and blood pressure (BP) and lipids in overweight and obese adolescents. DESIGN This is a cross-sectional study of 282 overweight or obese adolescents aged 14-18 years (86 males, 196 females) assessed at baseline prior to beginning a lifestyle(More)
IMPORTANCE Little evidence exists on which exercise modality is optimal for obese adolescents. OBJECTIVE To determine the effects of aerobic training, resistance training, and combined training on percentage body fat in overweight and obese adolescents. DESIGN, SETTING, AND PARTICIPANTS Randomized, parallel-group clinical trial at community-based(More)
INTRODUCTION During regular care, women with previous gestational diabetes mellitus (GDM) rarely receive the recommended screening test for type 2 diabetes, a 2-hour oral glucose tolerance test (OGTT), in the postpartum period. The current study examined whether the implementation of a reminder system improved screening rates. METHODS Based on our(More)
Aging is associated with an attenuated physiological ability to dissipate heat. However, it remains unclear if age-related impairments in heat dissipation only occur above a certain level of heat stress and whether this response is altered by aerobic fitness. Therefore, we examined changes in whole body evaporative heat loss (HE) as determined using whole(More)
Gestational diabetes mellitus (GDM) is gaining in importance as a predictor of future health risks for women and their offspring. In women, it is associated with increased long-term risks of diabetes, metabolic syndrome and increased cardiovascular disorders. For offspring of mothers with GDM, risks of GDM include abnormal glucose tolerance, obesity and(More)
OBJECTIVE To determine the effects of exercise order on acute glycemic responses in individuals with type 1 diabetes performing both aerobic and resistance exercise in the same session. RESEARCH DESIGN AND METHODS Twelve physically active individuals with type 1 diabetes (HbA(1c) 7.1 ± 1.0%) performed aerobic exercise (45 min of running at 60%(More)
OBJECTIVE In type 1 diabetes, small studies have found that resistance exercise (weight lifting) reduces HbA(1c). In the current study, we examined the acute impacts of resistance exercise on glycemia during exercise and in the subsequent 24 h compared with aerobic exercise and no exercise. RESEARCH DESIGN AND METHODS Twelve physically active individuals(More)
AIMS To describe the prevalence of impaired glucose tolerance and obesity in offspring of mothers whose pregnancies were complicated by gestational diabetes mellitus (GDM) in a low-risk population and to investigate the effect on these outcomes of minimal intervention compared with tight control for management of GDM. METHODS Eighty-nine children (mean(More)
Studies have reported that older females have impaired heat loss responses during work in the heat compared to young females. However, it remains unclear at what level of heat stress these differences occur. Therefore, we examined whole-body heat loss [evaporative (HE) and dry heat loss, via direct calorimetry] and changes in body heat storage (∆Hb, via(More)
We examined whether older individuals experience greater levels of hyperthermia and cardiovascular strain during an extreme heat exposure compared to young adults. During a 3-hour extreme heat exposure (44°C, 30% relative humidity), we compared body heat storage, core temperature (rectal, visceral) and cardiovascular (heart rate, cardiac output, mean(More)