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Overloaded Circuits: Why Smart People Underperform


Personalized nutrition is fast becoming a reality due to a number of technological, scientific, and societal developments that complement and extend current public health nutrition recommendations. The biology underpinning these recommendations is complex, and thus any recommendations must account for multiple biological processes and subprocesses occurring in various tissues and must be formed with an appreciation for how these processes interact with dietary nutrients and environmental factors.

Therefore, a systems biology—based approach that considers the most relevant interacting biological mechanisms is necessary to formulate the best recommendations to help people meet their wellness goals. Systems flexibility allows the real-time evaluation of metabolism and other processes that maintain homeostasis following an environmental challenge, thereby enabling the formulation of personalized recommendations. Examples in the area of macro- and micronutrients are reviewed. Genetic variations and performance goals are integrated into this systems approach to provide a strategy for a balanced evaluation and an introduction to personalized nutrition.

Finally, modeling approaches that combine personalized diagnosis and nutritional intervention into practice are reviewed. Nutrition and health are intimately related, and the science underpinning this relationship is the basis for global public health dietary recommendations. Recognizing that food and nutrition play a role in numerous medical conditions hypercholesteremia, hyperglycemia, hypertension, etc , various medical associations have established dietary guidelines for patient subgroups.

Health-related societies and nutrition expert groups have also published dietary guidelines for specific healthy populations, such as children, the elderly, pregnant women, and athletes.

Customized nutrition strategies have been added to patient treatment plans for many inborn errors of metabolism that have a specific nutrition component. Only recently, scientific evidence has shown that advances in analytical technologies, data science, molecular physiology, and nutritional knowledge may allow the subgrouping of populations to be refined to a more personal level. This has resulted in the definition and scientific substantiation of a range of personalized health and performance goals.

Indeed, with respect to nutrition, the boundaries between medical treatments, illness prevention strategies, and strategies to achieve optimal health have become artificial and are a legal hindrance to best nutritional practice. For example, the mechanisms of glycemic control and the nutritional approaches to optimize metabolic health and cure type 2 diabetes are almost identical, yet nutritional interventions are underused in medical practice. Already in , the Diabetes Prevention Program established by the US National Institute of Diabetes and Digestive and Kidney Diseases provided evidence that a multiyear lifestyle modification program was more effective than metformin treatment in reducing the incidence of diabetes in high-risk persons.

This article describes biological mechanisms from a systems perspective and outlines how the biology of personalized nutrition can be translated into recommendations for achieving specific health and performance goals for individuals Table 1. Table 1 Examples of personal goals in relation to personal nutrition. Public health recommendations for nutrition and diet are based on averages of population data. However, individuals who adhere to these recommendations will differ in their response because of the inherent variations in and complexity of individual genetic makeups that interact with a host of environmental stimuli.

Overall, the so-called omics revolution provides a solid framework for a systems-based approach to personalized nutrition research. There are, however, limitations to the application of the current framework of evidence based on randomized controlled trials, which are designed to minimize variation across study population groups, to these new opportunities.

In contrast, an approach to personalized research requires that individual variation be embraced, thus necessitating a different experimental approach. Indeed, enough inter-individual variation is available and can be quantified to fine-tune the genome—exome—phenome relationships. Until recently, this biological variation, now exposed by extensive and accurate phenotyping, was ignored dismissed as confounders or avoided minimized through stratification. Over the past 2 decades, various technological revolutions have provided the building blocks for a systems physiology approach.

The time is approaching when personal genomes, thousands of plasma proteins and metabolites can be scrutinized affordably, and detailed whole-body magnetic resonance imaging scans will become widely available. Methods to store, share, evaluate, integrate and interpret this staggering amount of personal health data are lagging behind, but several developments are promising and are worth mentioning here.

Changes in plasma biomarkers can reveal broad networks of related cellular processes, as described previously for micronutrients. The complexity of personalized nutrition requires a systems solution, not only from a homeo static viewpoint but also in the dynamic response to an environmental challenge. Because the relationship between nutrition and health is a continuously changing interaction between environment and physiology, it is important to understand how biological systems work together to maintain homeostasis.

A key component is the ability of the physiological system to continuously adapt to the variety and amount of foods consumed as well as to the timing of food consumption.

Humans eat food as meals and thus continuously switch from net anabolic to net catabolic conditions. This repeated switching both requires and trains systems flexibility, 11 although this advantage may become lost by the modern habit of regular snacking.

An important aspect of the relationship between human nutrition and health is the management of energy supply and substrate metabolism. Energy is provided primarily by carbohydrates, lipids, and proteins. A tightly regulated control network ensures that energy is properly distributed, utilized, and stored and that plasma concentrations of essential metabolites, such as glucose, are kept in homeostasis.

Peaks in plasma concentrations are corrected by master regulators such as insulin and glucagon , which are assisted by a range of fine-tuning mechanisms that govern biological processes and organ functions.

Maintenance of homeostasis under continually changing conditions is referred to as phenotypic flexibility or systems flexibility.

Under continued energy overload, the maintenance of homeostasis comes at a cost of adaptation: excess energy is stored as lipid in adipose tissue.

Once storage exceeds normal physiological boundaries, insulin resistance and complications start to develop, which potentially leads to pathologies that include adipose deposits in and around major organs, rising plasma glucose concentrations causing oxidative damage to microvasculature, and persistent low-grade inflammation triggered by macrophage infiltration in adipose tissue. In a human intervention study, a 4-week overfeeding regimen kept the 3 core processes glucose metabolism, lipid metabolism, and inflammation stable, whereas most metabolic, inflammatory, and endocrine processes regulating these core processes were changed.

These regulatory processes contribute to systems flexibility and illustrate the major molecular physiological efforts to maintain homeostasis. An advantage of considering regulatory processes in a systems-based approach is that it provides a means to identify changes in regulation before the onset of disease, and thus enables the application of proactive strategies to optimize health.

Different macronutrients act differently on overlapping regulatory processes involved in phenotypic flexibility Figure 1. For example, carbohydrates directly trigger an insulin response through rising glucose levels in circulation.

Triglycerides and fatty acids, on the other hand, do not induce an insulin response, but their metabolism is governed largely by insulin-dependent regulatory processes. Dietary protein consumed with carbohydrates can potentiate the insulin response, and individual amino acids can act as insulin secretagogues. These processes are described in detail in numerous reviews and textbooks. For the purpose of this review, it is important to stress that multiple, overlapping, tightly regulated processes control energy metabolism.

This regulation prevents the formation of excess concentrations of metabolic constituents by maintaining a complex machinery of metabolic flexibility that is distributed over many organs and processes. Redundant mechanisms ensure that this tight regulation is maintained. As noted above, the lack of phenotypic flexibility can lead to pathologies or to suboptimal health.

However, pathology does not necessarily develop during the process or within the organ where loss of flexibility occurs. For example, the failure of peripheral adipose tissue to adequately absorb glucose or convert it into fatty acids may lead to the accumulation of hepatic lipids. Several factors can cause insulin resistance, including nutrition overnutrition or, in some cases, micronutritional inadequacies and disease. Genetics may also contribute to the development of disease.

A systems biology view on personalized nutrition. Four interacting layers are used to demonstrate the connection between personal nutrition—based consumer goals top layer and nutrients bottom layer. The 2 middle layers the organ and process layers connect nutrients to goals and represent the detailing of the biological processes involved.

These 2 layers are extended in Figure 2. Abbreviations: K, potassium; Mg, magnesium. Both adipose tissue insulin resistance and hepatic insulin resistance affect systemic triglyceride handling and metabolic flexibility the capacity to switch from glucose to fatty acids as fuel in muscle.

Metabolic flexibility is impaired in obese individuals with type 2 diabetes 24 and likely contributes to the selective accumulation of saturated fatty acids. It shows several examples of mechanisms related to the loss of metabolic flexibility, which can result in liver steatosis and other metabolic impairments. Thus, many processes are connected to form a metabolic system in which all parts must function optimally and in which malfunctioning loss of flexibility of one of the processes may become manifest in other processes or organs.

Furthermore, different mechanisms may be impaired in different individuals with the same disease. In other words, although impaired phenotypic flexibility may contribute to morbidities, the opposite is also true: regaining or optimizing phenotypic flexibility is the basis of prevention and cure of metabolic diseases. Major processes in and between liver blue , muscle light green , pancreas brown , brain dark green , kidney pink , gut mustard , and adipose tissue purple involved in maintenance of plasma glucose homeostasis, each of them demonstrating aspects of glucose flexibility.

This biological network presents the middle part of the 4-layer scheme of Figure 1 see insert top right. In summary, systems flexibility is centrally positioned in health, disease, and, possibly, aging, and interindividual variations may have multiple causes and consequences. Systems flexibility is a combination of all of the interacting systems, each of which may have a genome component, and a response to environmental factors.

Often, single parameters of flexibility, such as glucose flexibility, are composites of many underlying processes, each possibly having individual characteristics. It is, therefore, important to observe, quantify, and intervene on a systems level and not only on the basis of single parameters.

Traditionally, plasma biomarkers are measured under homeostatic overnight fasting conditions. If system flexibility is indeed important to health, the quantification of flexibility and its use as a biomarker is relevant. Flexibility can be quantified by using tolerance, challenge, or stress tests. Further, there should be a clear distinction between how markers behave in response to a challenge under conditions of health versus conditions of disease.

A number of relevant biomarkers exist and are used in tolerance tests. The science, technology, and applicability of these stress response biomarkers in nutrition research has been extensively reviewed by Stroeve et al. The application of both an oral glucose tolerance test and a standardized mixed-meal challenge test to compare processes between healthy and metabolically impaired individuals ie, those with type 2 diabetes revealed a large number of biological processes that were different between the 2 groups S.

The same 2 challenge tests accurately quantified health differences within a cohort of healthy individuals ranging in age and fat percentage, substantiating the claim that these biomarkers can indeed be used to quantify health. This study used stress response biomarker panels comprising measured markers that could quantify all relevant systems flexibility processes. A growing number of nutritional intervention studies, including challenge tests, are being performed.

Eventually, the use of a challenge test that quantifies systems flexibility could become standard procedure in health diagnostics. A key question, then, is how to define and measure the state of optimal systems flexibility.

This could be achieved in part by using single-parameter methods like the oral glucose tolerance test, which can be used to determine a curve derived from optimal homeostatic fasting plasma glucose concentration, optimal plasma glucose peak concentration and time, optimal time to return to homeostasis, etc. This method can be used if sufficient data from a range of health, disease, and age conditions are available to establish the comparison between the measured outcome and the desired health outcome.

However, this method, underestimates the complexity of a systems-based approach because it disregards so many other processes involved in systems flexibility. The axes can be tailored to the scope of the intervention. Figure 3 28 , 30 provides an example, tailored to the topic of this review, with the 3 axes constructed as carbohydrate flexibility, lipid flexibility, and inflammatory stress. To support the advancement of new health space models, detailed information about organ and process flexibility can be obtained through a number of biomarker panels.

Until recently, these large biomarker panels have been too costly to be used outside of research projects. However, the cost of both genotypic and phenotypic biomarker panels is decreasing rapidly, and it is now possible to assess large research cohorts, patient populations, and even consumer groups on a routine basis, allowing new disruptive developments in healthcare, as described elsewhere. If so, what determines individual differences, and how can this be quantified?

The 3-dimensional space is created by 3 distinct axes, on purpose defined to represent biologically relevant processes this is in contrast with normal multivariate statistical approaches such as principle component analysis, where the axes are purely defined on statistical grounds.

Each of the axes is constructed from the systems flexibility response biomarker profiles connected to the processes mentioned with each axis see Stroeve et al 28 for a detailed explanation of the relationship between biomarkers and biological processes. The multivariate statistical approach is explained in Bouwman et al. Because multiple biological processes distributed over various organs, each of which might function suboptimally, are involved in systems flexibility, interventions that optimize these individual processes need to be designed.


Feeding Rhythms and the Circadian Regulation of Metabolism

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Megan Fox is an American actor and model. At the tender age of five, she enrolled in dance and drama classes. She is known for being one of the hottest actresses alive, and she has worked hard for it, both when it comes to her diet and workout. When it comes to her diet, she follows a five-factor diet allowing for 5 small meals a day, none of which include carbohydrates. To maintain good muscle structure, Fox uses resistance training with little rest to ensure that she gets her cardio in. Resistance training increases metabolism, burns calories, develops and protects bones, manages pain, sharpens focus and can help decrease the fat content. Fox is an amazing actress and her great physique has influenced many. Fox only trains with her trainer 3 times a week but is also a huge fan of pilates, cardio, and spin classes. She uses mini circuits for minutes during her hour session. On Tuesday, Megan Fox goes for a long jog, hit the elliptical for an hour, do a cycling class, or even some pilates.

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extreme circuits nutrition

Many times we eat, not because we are hungry, but because of social pressures or because the food is so appetizing, that, even though we are full, we just want another bite. Looking to contribute to the development of effective treatments for obesity, an international team led by researchers at Baylor College of Medicine investigated in an animal model how the brain regulates feeding triggered by hunger or other factors. Led by Dr. Yong Xu, professor of pediatrics -- nutrition and molecular and cellular biology at Baylor, the team discovered that although the brain regulates both types of feeding behavior through serotonin-producing neurons in the midbrain, each type of feeding is wired by its own independent circuit that does not influence the other type of feeding. The researchers also identified two serotonin receptors and two ion channels that can affect the feeding behaviors, opening the possibility that modulating their activities might help regulate overeating.

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Chris Pratt’s intense ‘Guardians of the Galaxy’ workout routine


No physique or strength training routine is complete without chest day. But are you doing the right exercises on chest day? Instead of mindlessly repping out push-ups or taking over the cable machine, get granular with the type of exercises you do for your chest. In addition to the mainstays like bench press and triceps dips, these are some of the top exercises to build a bigger, stronger chest. Related: Best Exercises for Bigger Shoulders Dumbbell Bench Press Variations: kettlebell bench press Why this is one of the best exercises for your chest: You probably expected to see traditional bench press on a list of the best exercises for your chest, but we argue that the dumbbell bench press holds just as much if not more value due to the stablization and muscle control needed to support heavy dumbbells.

12-Week Kickstart Programme

For a complete diet and fitness overhaul, our Week Kickstart Programme is the ultimate solution. Celebrity Circuits runs 4 x 12 Week Kickstarts every year. Everyone starts on the same date and by staying connected via a private support group on Facebook we are able to motivate one another to push hard, stay focused throughout and get the best results possible! Our daily email covering topics such as nutrition, training and mindset to help you stay motivated and give you the knowledge required to succeed in the long term. Tutorials on how to use My Fitness Pal - to make sure you understand the app and can use it effectively. A personalised calorie goal - this will be an achievable target based around your current goals. Private support group on Facebook - your own dedicated members area, that will allow you to support each other and give you access to all the information you need to get started. A midweek check in with written feedback via email.

Each workout is presented in a circuit format, in which you move from The P90X nutrition plan that accompanies the fitness DVDs has three phases you can.

Megan Fox Workout Routine

Weight Loss Nutrition Muscles. Do you have trouble losing body fat, yet seem to gain it after even the smallest slip up with your diet? Or does it feel like you can eat for days without gaining an ounce? It could have something to do with your current body type.

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They suffer from a newly recognized neurological phenomenon that the author, a psychiatrist, calls attention deficit trait, or ADT. The result is black-and-white thinking; perspective and shades of gray disappear. People with ADT have difficulty staying organized, setting priorities, and managing time, and they feel a constant low level of panic and guilt. Get enough sleep, switch to a good diet, and get adequate exercise. Break down large tasks into smaller ones, and keep a section of your work space clear. Try keeping a portion of your day free of appointments and e-mail.

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There are countless experts telling you they know the secret to getting slim by eating this or avoiding that. And with 45 million Americans dieting each year and most people failing at those diets, there much be so much more going on underneath the calls to snack on kale chips and forget the calls of Little Debbie. And you might not prefer the same weight your brain prefers. Guyenet likens the entire process to a thermostat. In your house, this device measures the temperature in your home and helps regulate it so that it stays stable. When the temperature goes up, the heat goes down or the ac turns on , and vice versa. In your brain, your thermostat is in the hypothalamus.

Metrics details. Following critical evaluation of the available literature to date, The International Society of Sports Nutrition ISSN position regarding caffeine intake is as follows:. Supplementation with caffeine has been shown to acutely enhance various aspects of exercise performance in many but not all studies.




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