Archive for December, 2006

Caloric restricition reduces aerobic capacity

Friday, December 22nd, 2006

Caloric restriction is associated with greater muscle loss than exercise induced weight loss. There was a greater loss of thigh muscle mass and strength in the caloric restriction group. The caloric restriction group also had a drop in aerobic capacity (VO2max), which is significant because high aerobic capacities are associated with ...

Long term low carbohydrate diets and heart disease

Thursday, December 21st, 2006

Data from the Nurses Study was used to examine any relationship between long term low carbohydrate diets and heart disease. Over 20 years, no relationship was found between low carbohydrate diets and heart disease. They did find a relationship between high glycemic diets and heart disease. The Metabolic Syndrome is primarily ...

Adiponectin, fat distribution and insulin resistance

Wednesday, December 20th, 2006

Adiponectin, a peptide hormone that is secreted from fat cells, appears to be part of the fat distribution puzzle. Subjects with higher adiponectin had less insulin resistance and lower waist circumferences. Moderate weight loss did not change adiponectin levels...so the fat distribution signal was still in place. Injections of adiponectin have ...

Oxidative stress associated with visceral fat

Tuesday, December 19th, 2006

High levels of visceral fat are associated with greater oxidative stress and the metabolic syndrome (syndome x). Even non-obese subjects exibited an association between visceral fat and oxidative stress. It is unclear if antioxidants might partially reverse syndrome x. It is clear that those with visceral fat accumulation should eat more ...

Strength training and hormones

Monday, December 18th, 2006

Non weight trainers were put on a 3 day a week strength training program. Immediately after strength training, there was a decrease in androgens and a decrease in the anabolic/catabolic hormones ratio. After the recovery, there was an increase in androgen levels...especially epitestosterone. The increase in androgens correlated with increases in ...

Carbohydrates during high intensity exercise does not raise insulin levels

Friday, December 15th, 2006

Runners where put through an intense bout of interval training and received either carbohydrates or a placebo. Interestingly, no differences in plasma insulin, cortisol or free fatty acids were observed. The carbohydrate group did achieve higher lactate levels during exercise, which could indicate a supression of fat burning or just a ...