What Is the Glycemic Index?
The glycemic index is a numerical ranking system used to measure the rate of digestion and absorption of foods and their resultant effect on blood glucose. A food that ranks high on the GI produces a large, momentary spike in glucose after the food is consumed. By contrast, a food with a low GI causes a slower, sustained rise in blood glucose.
California’s Proposition 37, which sought mandatory labeling of all GMO (genetically modified organism) food, was defeated in the November 2012 elections with major influence from a ~$45 million anti-37 campaign underwritten by Monsanto®, a company with enormous investment in GMO technology and products.
The simple act of walking offers myriad health benefits—reductions in stress, blood pressure and mortality, to name a few. Despite these benefits and the accessibility of walking, the majority of U.S. citizens do not walk continuously for more than 10 minutes in an average week.
Serving in the U.S. Armed Forces is physically demanding, and military leaders have developed measures to ensure recruits are “mission-ready.” Unfortunately, a significant number of both first-time applicants and active military personnel do not meet this standard.
Barbara Brehm-Curtis is a professor of exercise and sport studies at Smith College in Northampton, Massachusetts, where she teaches courses in stress management, nutrition and health. Aside from writing about health- and fitness-related topics for more than 25 years, she has worked as a fitness instructor, personal trainer, lifestyle coach and fitness program director. She has received the San Diego County Medical Society Media Award and was a Maggie Award finalist for regular columns in Fitness Management, where she served as a contributing editor.
When it comes to running—both shod and barefoot—debate abounds as to which foot strike is best, with many favoring a forefoot strike (FFS) or midfoot strike (MFS) over a rear-foot strike (RFS) for efficiency and injury prevention. But is there really an optimal way to run?
Melinda Manore is a professor in the department of nutrition and exercise sciences at Oregon State University. Her areas of expertise include integration of nutrition and physical activity for weight management, and prevention of chronic disease. Aside from authoring more than 100 scientific publications, book chapters and review articles, Manore has written four nutrition textbooks and two books for the Institute of Medicine’s Committee on Military Nutrition Research. Throughout her career, she has served on a number of nutrition and exercise editorial boards.