Track topics on Twitter Track topics that are important to you
The purpose of this study is to evaluate the effects of resistance training, aerobic training, and combined aerobic and resistance training on percent body fat, measured using Magnetic Resonance Imaging (MRI), in sedentary post-pubertal overweight or obese youth aged 14-18 years.
Background: Obesity and inactivity independently increase risks of chronic disease in adolescence and all-cause mortality in adulthood. In clinical trials, changes in exercise and diet can reduce adiposity and risk of diabetes and other chronic diseases in obese adults and youth. In many school systems, physical education is mandatory in elementary school but not high school, and physical activity often declines during adolescence. Because physical activity habits track from adolescence to adulthood, adolescence may represent a critical period for establishing a physically active lifestyle to prevent diseases associated with inactivity in adulthood. Obesity can make adherence to aerobic activity challenging, but would present less of an obstacle to resistance training. Resistance exercise has shown favorable effects on lean body mass, metabolic rate, insulin resistance, and quality of life in adults, but almost no research has examined effects of resistance training in obese adolescents. Our own survey in a sample of obese, primarily sedentary youth found greater overall interest in resistance exercise than aerobic exercise.
Objectives: The primary objective of this study is to evaluate the effects of resistance training, aerobic training, and combined aerobic and resistance training on percent body fat measured using Magnetic Resonance Imaging (MRI) in sedentary post-pubertal overweight or obese youth aged 14-18 years.
Study Design: Randomized controlled trial conducted at a single site. After a 4-week supervised low-intensity exercise run-in period to test compliance, 292 adolescents with BMI ≥ 85th percentile for age and gender will be randomized in equal numbers to one of 4 arms: Diet + aerobic exercise, diet + resistance exercise, diet + combined aerobic and resistance exercise, or diet-only control. The intervention will last 22 weeks, with a follow-up assessment at 6-months post-treatment (11-months post-randomization).
Hypotheses: Reduction in percent body fat will be larger in diet + aerobic exercise and diet + resistance exercise than diet-only controls at post-treatment, and the combined aerobic and resistance training will be superior to either aerobic or resistance training alone in reducing percent body fat at post-treatment. The combined resistance and aerobic group will show greater improvements in percent body fat, body composition, and physiological and psychosocial function at post-treatment and 12-months follow-up. Groups that include resistance training will produce greater psychosocial changes and better adherence than aerobic training alone at post-treatment and follow-up.
Significance: The global burden of obesity in youth is increasing, and more effective intervention is needed. This study may identify that resistance training is an important component in the treatment of overweight adolescents. As such, findings may influence clinical decision making in the management of juvenile obesity, as well as inform public health exercise guidelines and school-based physical education curricula in attempt to reduce the economic, medical, and psychosocial burden of obesity in youth.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Efficacy Study, Intervention Model: Factorial Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
aerobic and resistance exercise
Ottawa Health Research Institute
Ottawa Hospital Research Institute
Published on BioPortfolio: 2014-07-24T14:27:26-0400
The prevalence of abdominal obesity in the elderly is increasing at alarming rates and thus, requires immediate attention. By comparison to younger adults, obesity reduction in the elderl...
The purpose of this study is to identify the body's response to aerobic vs. resistance exercise. Throughout this study, we will examine food intake, appetite, and physical and mental well...
The purpose of this study is to determine the effect of age and fitness level on the physiological response to an acute bout of resistance or aerobic exercise.
We compared the effects of 8 weeks of aerobic exercise only, resistance exercise only, or a combination of both on blood pressure in overweight or obese middle-aged adults with elevated bl...
The purpose of the study was to observe therapeutic effects of combined resistance and aerobic exercise training (CRAE) on hyperinsulemia in obese adolescent girls. Forty obese adolescent ...
Anabolic resistance and impaired myocellular quality contribute to age-related sarcopenia, which exacerbates with obesity. Diet-induced muscle mass loss is attenuated by resistance or aerobic plus res...
Quevedo-Jerez, K, Gil-Rey, E, Maldonado-Martín, S, and Herrero-Román, F. Exercise-intensity adherence during aerobic training and cardiovascular response during resistance training in cancer survivo...
The benefits of aerobic exercise (AE) for cardiovascular disease (CVD) have been well documented. Resistance exercise (RE) has been traditionally examined for its effects on bone density, physical fun...
This study examined the short- and long-term effects of adding caloric restriction to 5 months of aerobic exercise training on executive function in sedentary older adults with obesity.
This study addressed the effects of acute, moderate-intensity aerobic and resistance exercise on the shifting aspect of cognition following a 30-min recovery period. It also explored the neuro-electri...
A type of strength-building exercise program that requires the body muscle to exert a force against some form of resistance, such as weight, stretch bands, water, or immovable objects. Resistance exercise is a combination of static and dynamic contractions involving shortening and lengthening of skeletal muscles.
Controlled physical activity, more strenuous than at rest, which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used. The intensity of exercise is often graded, using criteria such as rate of work done, oxygen consumption, and heart rate.
Alternating sets of exercise that work out different muscle groups and that also alternate between aerobic and anaerobic exercises, which, when combined together, offer an overall program to improve strength, stamina, balance, or functioning.
The exercise capacity of an individual as measured by endurance (maximal exercise duration and/or maximal attained work load) during an EXERCISE TEST.
Activities related to WEIGHT REDUCTION in patients with OBESITY. Treatment methods include DIET; EXERCISE; BEHAVIOR MODIFICATION; medications; and BARIATRIC SURGERY.
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...
Obesity is the condition in which excess fat has accumulated in the body (mostly in subcutaneous tissues). clinical obesity is considered to be present when a person has a BMI of over 30 (Oxford Dictionary of Medicine). It is becoming increasing common i...
Women's Health - key topics include breast cancer, pregnancy, menopause, stroke Follow and track Women's Health News on BioPortfolio: Women's Health News RSS Women'...