Showing posts with label Fitness and Nutrition. Show all posts
Showing posts with label Fitness and Nutrition. Show all posts

Monday, August 20, 2012

Bodybugg: Estimating your daily calorie burn

I won a Bodybugg calorie management device through a work fitness competition a few weeks ago and have been excited to try it out. I probably never would have bought something like this since a heart rate monitor just seems to make so much more sense for me but hey, it was free!


The device is worn around your left arm throughout the day and it uses sensors to measure 4 points: your motion, heat flux or the amount of heat your body gives off, galvanic skin response or your skin's conductivity and your skin temperature. The product is used in conjunction with a web-based application that allows you to enter in information about your body's parameters, your goals, activity levels and lifestyle. In addition, the web account allows you to enter in your meals for the day to track the calories consumed, gives you meal and nutritional suggestions based on the parameters you entered and offers resources to help you achieve your goals.

Thursday, July 26, 2012

The Ingredient List: Soy Lecithin

You hear from plenty of nutritionists and nutrition enthusiasts to read the ingredient labels on food and "don't buy anything with ingredients you can't pronounce or know what they are." Sounds easy. But the fact is that just about any food that goes through a decent amount of processing is going to contain ingredients we aren't quite familiar with. (On a side note, just about every food is "processed," what really matters is the degree of processing to get that final product. For example, frozen vegetables are processed in the sense that they are washed, cut and frozen. Bread is processed by combining ingredients, allowing the dough to rise and baking. Cheetos obviously go through a more complicated process to get their final form.)

To get to my point, while deciding between two snack bars today I was looking at the list of ingredients on each package and noticed that soy lecithin was an ingredient they both had in common. I am always up for learning something new, so here it is quick and dirty:

Dictionary definition of lecithin: "A substance widely distributed in animal tissues, egg yolk, and some higher plants, consisting of phospholipids linked to choline." (Note on choline: it's B vitamin that has been linked to brain development, reducing risk of heart disease and numerous other health benefits.)

Tuesday, July 24, 2012

Body Composition and Calorie Burn

Interesting estimates on the effects of body comp on metabolism...

Estimates for my height and age - 5'3" & 25 years old

The Body Mass Index (BMI) obviously has it's flaws and does not account for muscle mass and other body composition factors.

The Basal Metabolic Rate (BMR) assumes you did nothing but rest all day, it is purely supposed to represent the calories required to maintain your body functions (i.e. breathing). (Here the Mifflin-St. Jeor equations for BMR were used)

At 110 pounds:
BMI: 19.5 (Healthy)
BMR: 1,213 calories/day

At 120 pounds:
BMI: 21.3 (Healthy)
BMR: 1,258 calories/day

At 170 pounds:
BMI: 30.1 (Obese)
BMR: 1,485 calories/day

At 250 pounds:
BMI: 44.3 (Obese)
BMR: 1,848 calories/day (Picture this: laying in bed all day and eating about 14 pounds or 28 heads of broccoli to maintain your weight)

Friday, June 29, 2012

A Calorie is Not Just a Calorie

In the news this week there has been a lot of talk about the study released by JAMA and how the type of calories you consume, in addition to the amount, affects your weight. It's an interesting topic that I definitely think is worth considering, especially for those who are interested in maintaining their weight.  The results of this study showed that a low-carb, high fat diet helped people maintain their weight by reducing the caloric expenditure of their bodies the least.

Food Politics: Does Where Calories Come From Matter to Weight Maintenance by Marion Nestle - Marion's summary of her interpretation of the Journal of the American Medical Association's (JAMA) study published June 27th.

Low-Carb Diets May Burn the Most Calories on MSNBC Today.

Monday, June 4, 2012

The Western Diet

"The number of people with cancer is set to surge by more than 75 percent across the world by 2030, with particularly sharp rises in poor countries as they adopt unhealthy "Westernized" lifestyles... said the paper from the World Health Organization's International Agency for Research on Cancer (IARC) in Lyon, France." From the article: Cancer cases to surge 75 percent worldwide by 2030