Monthly Archives: November 2007

How Does Your Awareness of Your Physical Activity Affect Your Weight?

“A cross-sectional study of awareness of physical activity:
associations with personal, behavioral and psychosocial factors”

By: Esther MF van Sluijs, Simon J Griffin, and Mireille NM van Poppel
International Journal of Behavioral Nutrition and Physical Activity 2007
Published: 8 November 2007
Abstract (provisional)


Interventions to promote physical activity frequently target hypothesized mediators of change, but these might be affected by a person’s awareness of their own physical activity behavior. The paper aims to characterize a high-risk population by levels of awareness and to study associations between awareness and selected personal, behavioral and psychosocial factors.


Data were collected on physical activity behavior, physical activity awareness, behavioral and psychosocial factors and anthropometry cross-sectionally at 6-month follow-up in a physical activity promotion trial. Awareness was assessed by comparing dichotomous self-rated physical activity with achieving activity levels according to international guidelines. Four groups were distinguished: ‘Realistic Active’, ‘Realistic Inactive’, ‘Overestimator’, and ‘Underestimator’. Data were analyzed with ANCOVA, correcting for previous interventions and current physical activity level.


Of 632 participants (mean age: 56.3 years), 321 were inactive, 61.4% of whom rated themselves as active (‘Overestimators’). Compared to ‘Realistic Inactives’, ‘Overestimators’ were older, less likely to be smokers or to intend to increase their physical activity level, and had a lower body mass index. Furthermore, ‘Overestimators’ had similar scores to the ‘Realistic Actives’ on the psychological factors, but differed significantly from the ‘Realistic Inactives’.

People who overestimate their physical activity level appear to be healthier than people who aware of their low activity level. Overestimators also scored more positively on various psychosocial factors and were also less likely to intend to change their physical activity behavior, making awareness a potential barrier in physical activity promotion. Physical activity promotion strategies might include interventions with a focus on increasing awareness in this hard to reach population.”

This study is gratefully syndicated through OpenAccess

A New Search Engine for You

With the help of Google, we’ve just added out own search engine. You can see the it in the upper right hand corner on every page. It searches only scientifically authoritative sites. Search any questions that you have and we think that you’ll see the difference. Also, at the top of the search we’ve added some categories that may help you get better results.

In the future, we’ll give you search suggestions with our articles, tools, and calculators. That way you can get a basic understanding here and then confirm the principles or increase your understanding by using our search engine. Try it!

Researchers Compare Low Carb and Low Fat Diets for Weight Maintenance

Comparison of a low carbohydrate and low fat diet for weight maintenance in overweight or obese adults enrolled in a clinical weight management program

James D. LeCheminant, Cheryl A. Gibson, Debra K. Sullivan, Sandra Hall, Rik Washburn, Mary C. Vernon, Chelsea Curry, Elizabeth Stewart, Eric C. Westman and Joseph E. Donnelly email

Nutrition Journal 2007, 6:36doi:10.1186/1475-2891-6-36
Published: 1 November 2007


Recent evidence suggests that a low carbohydrate (LC) diet may be equally or more effective for short-term weight loss than a traditional low fat (LF) diet; however, less is known about how they compare for weight maintenance. The purpose of this study was to compare body weight (BW) for participants in a clinical weight management program, consuming a LC or LF weight maintenance diet for 6 months following weight loss.

Fifty-five (29 low carbohydrate diet; 26 low fat diet) overweight/obese middle-aged adults completed a 9 month weight management program that included instruction for behavior, physical activity (PA), and nutrition. For 3 months all participants consumed an identical liquid diet (2177 kJ/day) followed by 1 month of re-feeding with solid foods either low in carbohydrate or low in fat. For the remaining 5 months, participants were prescribed a meal plan low in dietary carbohydrate (~20%) or fat (~30%). BW and carbohydrate or fat grams were collected at each group meeting. Energy and macronutrient intake were assessed at baseline, 3, 6, and 9 months.

The LC group increased BW from 89.2 +/- 14.4 kg at 3 months to 89.3 +/- 16.1 kg at 9 months (P=0.84). The LF group decreased BW from 86.3 +/- 12.0 kg at 3 months to 86.0 +/- 14.0 kg at 9 months (P=0.96). BW was not different between groups during weight maintenance (P=0.87). Fifty-five percent (16/29) and 50% (13/26) of participants for the LC and LF groups, respectively, continued to decrease their body weight during weight maintenance.

Following a 3 month liquid diet, the LC and LF diet groups were equally effective for BW maintenance over 6 months; however, there was significant variation in weight change within each group.

This study is gratefully syndicated through OpenAccess

What all the diet book have in common

If you’ve read any diet books then you know that it can be pretty confusing. Hundred of pages of science, theory, and recipes. Maybe it will help, may not. Are they all really different?

Diet book writers have to focus on a small aspect of your metabolism. So ehy tell you to avoid protein, or carbs, or add fiber or omega 3 oils. Even though they all agree on one thing, we read the books and focus on the other things.

What do they all agree on? You need to eat lots of fruits and vegetables. That’s a good place for you to start.