Archive for October, 2006
Tuesday, October 31st, 2006
While it is well established that caffeine reduces insulin sensitivity, coffee (and tea for that matter) increases insulin sensitivity and reduces susceptibility to diabetes.
It makes sense that other chemicals in coffee may be responsible for the improved glucose response. The researchers speculated that it may be chlorogenic acid and quinides.
At ...
Posted in Diet | No Comments »
Monday, October 30th, 2006
A single bout of exercise can reverse the insulin resistance brought on by a high fat meal. Insulin signaling improved after exercise, probably as the result of glycogen depletion.
The researchers did not specify the type of fat used in the abstract, but omega-3 polyunsaturated and monounsaturated fats improved insulin sensitivity ...
Posted in Exercise | No Comments »
Saturday, October 28th, 2006
Collegiate runners completed a series of runs at different intensities and at different hydration states. When slightly dehydrated, they experienced higher cortisol levels and a reduced testosterone to cortisol ratio, both before and after aerobic exercise.
Dehydration is a stressor and will prompt a stress response (cortisol release). The reduced testosterone ...
Posted in Exercise | No Comments »
Friday, October 27th, 2006
There was no difference in the maximal fat oxidation rates in trained and untrained women, and maximal fat oxidation occurred at nearly the same exercise intensity, but the trained women were able to oxidize more fat at higher intensities.
Abstract
Posted in Exercise | No Comments »
Thursday, October 26th, 2006
Postmenopausal African American and Caucasian women performed aerobic exercise 3 or 4 times per week for 6 months. While both groups had similar positive results, the African American women experienced a greater reduction in resting metabolic rate.
The sample size was particularly small. Only 47 women participated and with control groups ...
Posted in Exercise | No Comments »
Wednesday, October 25th, 2006
Compared to lean women, obese women have impaired leptin signaling leading to reduced insulin sensitivity. The defective signaling appears to be related to leptin receptors in subcutaneous fat but not visceral fat.
Leptin signals body fat levels to the brain, affecting appetite. High leptin levels are usually found in obese people ...
Posted in Hormones | 1 Comment »
