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The CrossFit stimulus—constantly varied high-intensity functional movement coupled with meat and vegetables, nuts and seeds, some fruit, little starch, and no sugar—prepares you for the demands of a healthy, functional, independent life and provides a hedge against chronic disease and incapacity. This stimulus is elegant in the mathematical sense of being marked by simplicity and efficacy. The proven elements of this broad, general, and inclusive fitness, in terms of both movement and nutrition, are what we term our CrossFit Essentials.

A 2020 review finds more than three-quarters of those serving on the boards of major medical organizations have received funding from industry. This indication of pervasive conflicts of interest among the leadership of leading U.S. medical organizations reveals the level of industry influence may be substantial.

Read MoreFinancial Ties Between Leaders of Influential U.S. Professional Medical Associations and Industry

This article, the second installment in a four-part series on meal timing, discusses the physiological effects of various time-restricted eating patterns. Series author Tyler Hass reviews the scientific literature on the subject and calls for more studies on a wider variety of populations using different intermittent fasting strategies, better quality food, and more effective exercise protocols.

Read MoreMeal Timing: The Fasting Window

A team of researchers from Curtin University in Australia conducted a literature review to identify the molecular commonalities of obesity, diabetes, and Alzheimer’s disease. Here, they examine the possible mechanisms behind the proposed connection.

Read MoreInflammation and Oxidative Stress: The Molecular Connectivity Between Insulin Resistance, Obesity, and Alzheimer’s Disease

A late April 2020 analysis finds consistent evidence across multiple samples that chronic disease increases COVID-19 risk. The authors propose five possible mechanisms to explain why persons with cardiovascular disease, hypertension, chronic kidney disease, and diabetes experience increased COVID-19 severity.

Read MoreComorbid Chronic Diseases and Acute Organ Injuries Are Strongly Correlated With Disease Severity and Mortality Among COVID-19 Patients

A case study from 2000 demonstrated the causal role of excessive insulin in polycystic ovarian syndrome (PCOS) as well as weight gain. Jason Fung, MD, explains further insights the case offered regarding the etiology of PCOS.

Read MoreWhat Causes PCOS?