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Nathan Goodyear

Fructose decreases physical activity and increases body fat without affecting hippocamp... - 0 views

  • the fructose animals gained significantly more weight than the glucose animals
  • The average liver mass of mice in the fructose treatment group was 20% heavier than for mice in the glucose group
  • The fat pads of mice consuming the fructose diet were 69% heavier than the fat pads of animals consuming the glucose diet
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  • there are many studies showing that consumption of fructose in comparison to other monosaccharides results in increased de novo lipogenesis, dyslipidemia, insulin resistance, BW6, 7 and, most recently, impaired cognitive function
  • in the present study, the intake of fructose by mice was more similar to that of typical human consumption in comparison to previous studies
  • prolonged consumption of diets containing fructose (11 weeks) increased BW and body fat deposition
  • studies in humans confirm that fructose, but not glucose (when provided as 25% of energy requirements), in the context of an energy-balanced diet increases de novo lipogenesis and visceral adiposity along with dyslipidemia, decreases insulin sensitivity10, 12 and decreases in fat oxidation
  • we hypothesize that fructose may reduce voluntary energy expenditure in terms of physical activity.
  • significant reduction (~20%) in physical activity in the fructose-fed animals in comparison to glucose
  • a recent study reported that ingestion of fructose (25% energy intake, 10 weeks) in human volunteers also resulted in reduced energy expenditure in relation to a diet with the same glucose dose
  • There is certainly evidence to suggest that, for example, exercise is able to prevent dyslipidemia in healthy subjects fed a weight-maintenance high-fructose diet (30%)54, which strongly suggests a protective role of physical activity in metabolic regulation.
  • the potential negative effects of fructose in brain and cognitive function have been investigated, with a series of studies showing cognitive deficits in spatial memory and learning in adolescent and adult animals following access to a high fructose diet
  • access to both fructose and sucrose, but not glucose, results in a 40% reduction in hippocampal neurogenesis
  • Collectively these studies seem to suggest that fructose consumption can have a considerable impact on hippocampal function and learning, which is in direct contrast with what we observed.
  • the impact of fructose is apparent only in BW, liver mass and body fat, but not in cognitive measures or rates of neurogenesis
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    animal study finds that fructose increased liver mass, abdominal fat and decreased physical activity when compared to glucose.  The study groups were iso caloric, but one group was fed 18% fructose and the other 18% glucose.
Nathan Goodyear

Obesity, Abdominal Obesity, Physical Activity, and Caloric Intake in US Adults: 1988 to... - 0 views

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    Observational study finds BMI increase of 0.375 in both men and women per year.  The waist circumference also increased by 0.37% per year in women compared to 0.27% in men.  There was a significant reduction in physical activity over the same time period.  In women, the reporting of physical inactivity increased to 52% FROM 19% compared to 44% FROM 11% in men.  The authors found no association with change in calories.  However, an assessment in quality of calories would have likely shown a glaring difference.  Clear causation can not be concluded due to the fact that the study was observational.
Nathan Goodyear

Testosterone and the Cardiovascular System: A Comprehensive Review of the Clinical Lite... - 0 views

  • Low endogenous bioavailable testosterone levels have been shown to be associated with higher rates of all‐cause and cardiovascular‐related mortality.39,41,46–47 Patients suffering from CAD,13–18 CHF,137 T2DM,25–26 and obesity27–28
  • have all been shown to have lower levels of endogenous testosterone compared with those in healthy controls. In addition, the severity of CAD15,17,29–30 and CHF137 correlates with the degree of testosterone deficiency
  • In patients with CHF, testosterone replacement therapy has been shown to significantly improve exercise tolerance while having no effect on LVEF
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  • testosterone therapy causes a shift in the skeletal muscle of CHF patients toward a higher concentration of type I muscle fibers
  • Testosterone replacement therapy has also been shown to improve the homeostatic model of insulin resistance and hemoglobin A1c in diabetics26,68–69 and to lower the BMI in obese patients.
  • Lower levels of endogenous testosterone have been associated with longer duration of the QTc interval
  • testosterone replacement has been shown to shorten the QTc interval
  • negative correlation has been demonstrated between endogenous testosterone levels and IMT of the carotid arteries, abdominal aorta, and thoracic aorta
  • These findings suggest that men with lower levels of endogenous testosterone may be at a higher risk of developing atherosclerosis.
  • Current guidelines from the Endocrine Society make no recommendations on whether patients with heart disease should be screened for hypogonadism and do not recommend supplementing patients with heart disease to improve survival.
  • The Massachusetts Male Aging Study also projects ≈481 000 new cases of hypogonadism annually in US men within the same age group
  • since 1993 prescriptions for testosterone, regardless of the formulation, have increased nearly 500%
  • Testosterone levels are lower in patients with chronic illnesses such as end‐stage renal disease, human immunodeficiency virus, chronic obstructive pulmonary disease, type 2 diabetes mellitus (T2DM), obesity, and several genetic conditions such as Klinefelter syndrome
  • A growing body of evidence suggests that men with lower levels of endogenous testosterone are more prone to develop CAD during their lifetimes
  • There are 2 major potential confounding factors that the older studies generally failed to account for. These factors are the subfraction of testosterone used to perform the analysis and the method used to account for subclinical CAD.
  • The biologically inactive form of testosterone is tightly bound to SHBG and is therefore unable to bind to androgen receptors
  • The biologically inactive fraction of testosterone comprises nearly 68% of the total testosterone in human serum
  • The biologically active subfraction of testosterone, also referred to as bioavailable testosterone, is either loosely bound to albumin or circulates freely in the blood, the latter referred to as free testosterone
  • It is estimated that ≈30% of total serum testosterone is bound to albumin, whereas the remaining 1% to 3% circulates as free testosterone
  • it can be argued that using the biologically active form of testosterone to evaluate the association with CAD will produce the most reliable results
  • English et al14 found statistically significant lower levels of bioavailable testosterone, free testosterone, and free androgen index in patients with catheterization‐proven CAD compared with controls with normal coronary arteries
  • patients with catheterization‐proven CAD had statistically significant lower levels of bioavailable testosterone
  • In conclusion, existing evidence suggests that men with CAD have lower levels of endogenous testosterone,13–18 and more specifically lower levels of bioavailable testosterone
  • low testosterone levels are associated with risk factors for CAD such as T2DM25–26 and obesity
  • In a meta‐analysis of these 7 population‐based studies, Araujo et al41 showed a trend toward increased cardiovascular mortality associated with lower levels of total testosterone, but statistical significance was not achieved (RR, 1.25
  • the authors showed that a decrease of 2.1 standard deviations in levels of total testosterone was associated with a 25% increase in the risk of cardiovascular mortality
  • the relative risk of all‐cause mortality in men with lower levels of total testosterone was calculated to be 1.35
  • higher risk of cardiovascular mortality is associated with lower levels of bioavailable testosterone
  • Existing evidence seems to suggest that lower levels of endogenous testosterone are associated with higher rates of all‐cause mortality and cardiovascular mortality
  • studies have shown that lower levels of endogenous bioavailable testosterone are associated with higher rates of all‐cause and cardiovascular mortality
  • It may be possible that using bioavailable testosterone to perform mortality analysis will yield more accurate results because it prevents the biologically inactive subfraction of testosterone from playing a potential confounding role in the analysis
  • The earliest published material on this matter dates to the late 1930s
  • the concept that testosterone replacement therapy improves angina has yet to be proven wrong
  • In more recent studies, 3 randomized, placebo‐controlled trials demonstrated that administration of testosterone improves myocardial ischemia in men with CAD
  • The improvement in myocardial ischemia was shown to occur in response to both acute and chronic testosterone therapy and seemed to be independent of whether an intravenous or transdermal formulation of testosterone was used.
  • testosterone had no effect on endothelial nitric oxide activity
  • There is growing evidence from in vivo animal models and in vitro models that testosterone induces coronary vasodilation by modulating the activity of ion channels, such as potassium and calcium channels, on the surface of vascular smooth muscle cells
  • Experimental studies suggest that the most likely mechanism of action for testosterone on vascular smooth muscle cells is via modulation of action of non‐ATP‐sensitive potassium ion channels, calcium‐activated potassium ion channels, voltage‐sensitive potassium ion channels, and finally L‐type calcium ion channels
  • Corona et al confirmed those results by demonstrating that not only total testosterone levels are lower among diabetics, but also the levels of free testosterone and SHBG are lower in diabetic patients
  • Laaksonen et al65 followed 702 Finnish men for 11 years and demonstrated that men in the lowest quartile of total testosterone, free testosterone, and SHBG were more likely to develop T2DM and metabolic syndrome.
  • Vikan et al followed 1454 Swedish men for 11 years and discovered that men in the highest quartile of total testosterone were significantly less likely to develop T2DM
  • authors demonstrated a statistically significant increase in the incidence of T2DM in subjects receiving gonadotropin‐releasing hormone antagonist therapy. In addition, a significant increase in the rate of myocardial infarction, stroke, sudden cardiac death, and development of cardiovascular disease was noted in patients receiving antiandrogen therapy.67
  • Several authors have demonstrated that the administration of testosterone in diabetic men improves the homeostatic model of insulin resistance, hemoglobin A1c, and fasting plasma glucose
  • Existing evidence strongly suggests that the levels of total and free testosterone are lower among diabetic patients compared with those in nondiabetics
  • insulin seems to be acting as a stimulant for the hypothalamus to secret gonadotropin‐releasing hormone, which consequently results in increased testosterone production. It can be argued that decreased stimulation of the hypothalamus in diabetics secondary to insulin deficiency could result in hypogonadotropic hypogonadism
  • BMI has been shown to be inversely associated with testosterone levels
  • This interaction may be a result of the promotion of lipolysis in abdominal adipose tissue by testosterone, which may in turn cause reduced abdominal adiposity. On the other hand, given that adipose tissue has a higher concentration of the enzyme aromatase, it could be that increased adipose tissue results in more testosterone being converted to estrogen, thereby causing hypogonadism. Third, increased abdominal obesity may cause reduced testosterone secretion by negatively affecting the hypothalamus‐pituitary‐testicular axis. Finally, testosterone may be the key factor in activating the enzyme 11‐hydroxysteroid dehydrogenase in adipose tissue, which transforms glucocorticoids into their inactive form.
  • increasing age may alter the association between testosterone and CRP. Another possible explanation for the association between testosterone level and CRP is central obesity and waist circumference
  • Bai et al have provided convincing evidence that testosterone might be able to shorten the QTc interval by augmenting the activity of slowly activating delayed rectifier potassium channels while simultaneously slowing the activity of L‐type calcium channels
  • consistent evidence that supplemental testosterone shortens the QTc interval.
  • Intima‐media thickness (IMT) of the carotid artery is considered a marker for preclinical atherosclerosis
  • Studies have shown that levels of endogenous testosterone are inversely associated with IMT of the carotid artery,126–128,32,129–130 as well as both the thoracic134 and the abdominal aorta
  • 1 study has demonstrated that lower levels of free testosterone are associated with accelerated progression of carotid artery IMT
  • another study has reported that decreased levels of total and bioavailable testosterone are associated with progression of atherosclerosis in the abdominal aorta
  • These findings suggest that normal physiologic testosterone levels may help to protect men from the development of atherosclerosis
  • Czesla et al successfully demonstrated that the muscle specimens that were exposed to metenolone had a significant shift in their composition toward type I muscle fibers
  • Type I muscle fibers, also known as slow‐twitch or oxidative fibers, are associated with enhanced strength and physical capability
  • It has been shown that those with advanced CHF have a higher percentage of type II muscle fibers, based on muscle biopsy
  • Studies have shown that men with CHF suffer from reduced levels of total and free testosterone.137 It has also been shown that reduced testosterone levels in men with CHF portends a poor prognosis and is associated with increased CHF mortality.138 Reduced testosterone has also been shown to correlate negatively with exercise capacity in CHF patients.
  • Testosterone replacement therapy has been shown to significantly improve exercise capacity, without affecting LVEF
  • the results of the 3 meta‐analyses seem to indicate that testosterone replacement therapy does not cause an increase in the rate of adverse cardiovascular events
  • Data from 3 meta‐analyses seem to contradict the commonly held belief that testosterone administration may increase the risk of developing prostate cancer
  • One meta‐analysis reported an increase in all prostate‐related adverse events with testosterone administration.146 However, when each prostate‐related event, including prostate cancer and a rise in PSA, was analyzed separately, no differences were observed between the testosterone group and the placebo group
  • the existing data from the 3 meta‐analyses seem to indicate that testosterone replacement therapy does not increase the risk of adverse cardiovascular events
  • the authors correctly point out the weaknesses of their study which include retrospective study design and lack of randomization, small sample size at extremes of follow‐up, lack of outcome validation by chart review and poor generalizability of the results given that only male veterans with CAD were included in this study
    • Nathan Goodyear
       
      The authors here present Total Testosterone as a "confounding" value
    • Nathan Goodyear
       
      This would be HSD-II
  • the studies that failed to find an association between testosterone and CRP used an older population group
  • low testosterone may influence the severity of CAD by adversely affecting the mediators of the inflammatory response such as high‐sensitivity C‐reactive protein, interleukin‐6, and tumor necrosis factor–α
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    Good review of Testosterone and CHD.  Low T is associated with increased all cause mortality and cardiovascular mortality, CAD, CHF, type II diabetes, obesity, increased IMT,  increased severity of CAD and CHF.  Testosterone replacement in men with low T has been shown to improve exercise tolerance in CHF, improve insulin resistance, improve HgbA1c and lower BMI in the obese.
Nathan Goodyear

JAMA Network | JAMA Pediatrics | Physical Activity and Performance at School:... - 0 views

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    literature review finds evidence that higher physical activity is associated with increased academic performance at school, though data is limited.
Nathan Goodyear

A reverse J-shaped association of leisure time physical activity with prognosis in pati... - 0 views

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    Increased risk of cardiovascular events and all-cause mortality is highest in the least active population in those with coronary heart disease.  However, those with the highest, strenuous physical activity were also at increased risk--though less than the inactive group.
wheelchairindia9

Wheelchair Pediatric - 0 views

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    When it comes to wheelchairs, young children have a different set of needs than adults. Aesthetically, devices designed for kids are often sleek and colorful, and functionally, they are typically lightweight and adjustable. As any parent knows, young people don't stay the same size for long and since a wheelchair is a major purchase don't want a simple growth spurt to render it useless. That's why kids wheelchair category offers models that feature seat width and depth adjustability, elevating legrests, and other versatile features. Pediatric walkers differ from adult walkers in several ways. For one, walking aids for children are usually adjustable, taking growth patterns into account; but many models also provide gait training and postural correction. Those caring for kids in their formative years must be concerned about more than just the young person's mobility, they must also consider their development. Cerebral Palsy Wheelchair: Cerebral Palsy Wheelchair Description: The model designed for cerebral palsy child only. Ultra light weight aluminium alloy frame Seat Width 38 cms (15") Net Weight: 18.5 kgs Epoxy powder coated frame Detachable arm rest & foot rest provided Elevated and swinging foot rest Elevated foot rest provided to elevate leg angle Height adjustable and detachable head rest Hydraulic reclining high back for a comfortable posture Hydraulic adjustable seat angle Detachable back and seat pad Extra cushion upholstery provided to under arm, head & calg Foldable Lever and paddle brakes provided Safety belt provided Maintenance free rear solid wheels Cloth look like water proof upholstery Anti wheels for better safety and stability Extra cushion upholstery provided to under arm, head & leg Folding action Lever and paddle brakes provided Safety belt provided Maintenance free rear solid wheels Cerebral Palsy Wheelchair Recline system: Recline system provides kids with the most comfortable resting environme
Nathan Goodyear

Muscles, exercise and obesity: skeletal muscle as a secretory organ : Abstract : Nature... - 0 views

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    Skeletal muscles are much more than just about contraction.  There produce inflammatory cytokines and other signals that have endocrine-like effects.  This article calls them myokines.  A decrease in physical activity would leave an altered myokine response effecting the liver, adipose tissue, immune system and pancreatic function.
wheelchairindia9

Cp Child Wheelchair - 0 views

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    young children have a different set of needs than adults. Aesthetically, devices designed for kids are often sleek and colorful, and functionally, they are typically lightweight and adjustable. As any parent knows, young people don't stay the same size for long and since a wheelchair is a major purchase -- don't want a simple growth spurt to render it useless. Wheelchair category offers models that feature seat width and depth adjustability, elevating legrests, and other versatile features. As a weight-bearing activity is critical to proper physical and mental function-which is why children with cerebral palsy, who may sit for stretches in a wheelchair and typically are unable to stand on their own, can benefit greatly from pediatric standers as part of a comprehensive pediatric rehabilitation program. Pediatric standers are offered in passive, active and mobile formats: Passive standers stay in one place and feature a support surface, active standers allow reciprocal movement of the extremities while in a standing position, and mobile standers enable users to self-propel. Cerebral Palsy Wheelchair: Cerebral Palsy Wheelchair Description: The model designed for cerebral palsy child only. Ultra light weight aluminium alloy frame. Seat Width 38 cms (15"). Net Weight: 18.5 kgs. Epoxy powder coated frame. Detachable arm rest & foot rest provided. Elevated and swinging foot rest. Elevated foot rest provided to elevate leg angle. Height adjustable and detachable head rest. Hydraulic reclining high back for a comfortable posture. Hydraulic adjustable seat angle. Detachable back and seat pad. Extra cushion upholstery provided to under arm, head & calg Foldable. Lever and paddle brakes provided. Safety belt provided. Maintenance free rear solid wheels. Cloth look like water proof upholstery. Anti wheels for better safety and stability. Extra cushion upholstery provided to under arm, head & leg. Folding action. Lever and paddle brakes provide
Nathan Goodyear

Pre- and Postdiagnosis Physical Activity, Television Viewing, and M... - PubMed - NCBI - 0 views

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    Physical activity in colon cancer patients improves survival compared to increased mortality with increase TV viewing.  We physicians must increase the practice of exercise prescriptions.
Nathan Goodyear

Hormonal and lifestyle determinants of appendicular skeletal muscle mass in men: the MI... - 0 views

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    muscle loss, sarcopenia is a significant marker of poor health in men.  This study of 845 men age 45-85 finds that low Testosterone, low vitamin D, low physical activity, smoking, and thin body build are associated with sarcopenia in men.
Nathan Goodyear

Frontiers | The Beneficial Effects of Physical Activity on Impaired Adult Neurogenesis ... - 0 views

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    Neurogenesis and neuroplasticity are under epigenetic control.  Stress and aging downregulate adult neurogenesis; whereas physical activity, environment enrichment and learning/memory increase.  Check out figure 1.  Exercise increases BDNF and hence neuroplasticity.  This was a synRas mouse study.
wheelchairindia9

Wheelchair 4 Wheel Drive - 0 views

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    A wheelchair is a wheeled mobility device in which the user sits. The device is propelled either manually (by turning the wheels by the hand) or via various automated systems. Wheelchairs are used by people for whom walking is difficult or impossible due to illness (physiological or physical), injury, or disability. The chair seat size (width and depth), seat-to-floor height, footrests/leg rests, front caster outriggers, adjustable backrests, controls, and many other features can be customized on, or added to, many basic models, while some users, often those with specialised needs, may have wheelchairs custom-built. The usual size of the rear wheel ranges from twenty to twenty-six inches in diameter. A larger wheel increases the height of the seat off the ground and decreases the rolling resistance, thus easing the effort of pushing. The rear wheels can be solid or pneumatic. Solid wheels have a low rolling resistance and are very easy to maintain. They are ideal for use in institutional settings or for indoor use in noncarpeted areas. Pneumatic wheels have better grip on carpeted surfaces and are better if there is going to be significant outdoor use, but they run the risk of flats and require higher maintenance. The flat tire problem can be circumvented by the use of a foam insert that can prevent leaks. Wire spokes are lighter in weight but higher in maintenance. Most older persons will select large plastic spokes referred to as mag wheels. The wheels can be offset posteriorly to decrease the risk of tipping backwards. Wheelchair With 4 Small Wheels: Wheelchair With 4 Small Wheels foldable frame wheelchair made of chrome with 18" inches seat width, 8" Inches Front and Rear wheel, total weight 14 kg helps physical challenged person to move around indoor. Wheelchair With 4 Small Wheels Measurements: Seat Width : 16 inch., 18 inch. Frame Style : Foldable Frame Material : M.S. Chrome open position wheel to wheel width in : 22" (inches) Seat Width : 1
wheelchairindia9

Tricycle For Disabled Children - 0 views

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    The tricycles are individually designed to meet the needs of each disabled child and help provide physiotherapy, build muscle tone and promote play. Italso help benefit growth and development in children with disabilities, enabling them to keep active and retain their independence. Disabled children get huge physical and emotional benefits from having the specially tricycles, which are each custom made to suit the individual child's needs. Riding a tricycle provides both fun and fitness, and is a therapeutic activity that allows children to exercise their lower extremities. As the muscles move through cycling motions, they are flexed, extended and stretched. This range of motion is crucial for children with disabilities, because muscles are incapable of keeping up with bone growth unless fully extended. Tricycles are provided to severely disabled children and adults and come in two sizes, 20 inch and 24 inch models. These trikes are grant funded and to qualify for one of these, an individual must suffer from a condition such as, but not limited to, Cerebral Palsy, Down Syndrome, Traumatic Brain Injury or Autism. Trunk support system is ideal for riders who have trouble remaining upright while seated. An optional headrest is available. A headrest can be purchased with either a flat or contoured headpiece, and adjusts both horizontally and vertically for optimum positioning. The Front Pulley System maintains a level pedal position for children whose extreme tone forces the front of the pedal downward. Turn the oval knob to raise and lower the handlebar. A handbrake for the conventional handlebar will arrive installed on Large tricycle. Open access combined with a low transfer step makes it easy to get on and off trikes. Tricycle Deluxe Double Hand Drive: Frame : Made by E.R.W. Tubes 38.0 mm-16 G. 25.4 mm & 22.22 mm- 18 G. Seat & Back : M S, C.R.C. Sheet. Seat Size 18"x 16" Wheel Size : Wheel Diameter 24"x 1 1/2" Tyre and Tube Standard Company. Pa
wheelchairindia9

Weight Cuff - 0 views

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    Tynor Weight Cuff Tynor Weight cuffs are used to exercise ailing joints to build strength and aid recovery. Tynor Weight Cuff is flexible and cushion, so it does not injure. Recommended for use to improve muscle tone, muscle mass, strength and stamina. Tynor Weight Cuff Features Offers 1 kg resistance when wrapped around Weight is wrapped in comfortable and soft fabric Used to build muscles, flexibility or to lose weight Can be secured easily around to prevent injuries or accidents Cuff is safe to be used during everyday activities as well Tynor Weight Cuff Measurements Sizes Available: 1/2 Kg / 1Kg / 2 Kg
wheelchairindia9

Chest Binder - 0 views

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    Tynor Chest Binder Chest Binder is applied to the thoracic region to compress and bind the rib cage and provide splinting to the sternum while allowing sufficient flexibility for comfortable breathing. Anatomic chest pad. Controlled compression. Optimum chest splinting. Soft feel. Tynor Chest Binder Features 50 mm thick PUF pad hold and binds the fractured sternum without compromising on patient comfort. Strong elastic band gives good grip and helps in equidistribution of pressure. Reduces post operative pain and discomfiture. Facilitates phlegm expulsion after cardio thoracic surgery. Tynor Chest Binder Measurements Measure circumference around the chest.
Nathan Goodyear

Young Men With Poor Cardiorespi... [Int J Sport Nutr Exerc Metab. 2013] - PubMed - NCBI - 0 views

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    Low physical activity and low TT in men associated with oxidized LDL.
Nathan Goodyear

Correlates of low testosterone in men with chronic... [Andrology. 2014] - PubMed - NCBI - 0 views

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    low physical activity, high BMI and low libido are independent predictors of low Testosterone.
Nathan Goodyear

Physical activity and all-cause mortality across levels of overall and abdominal adipos... - 0 views

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    Mortality increased by sedentary lifestyle.  The risk is on par with that of BMI and waist circumference.
Nathan Goodyear

Combined Diet and Physical Activity Promotion Programs to Prevent Type 2 Diabetes Among... - 0 views

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    Meta analysis does find that diet and exercise (lifestyle changes) do reduce risk of diabetes.
Nathan Goodyear

PLOS ONE: Are Baby Boomers Healthier than Generation X? A Profile of Australia's Workin... - 0 views

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    Generation X more obese than baby boomers.  There was no difference in physical activity levels.  This points only to environment i.e. diet, environmental toxins...
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