A recent study published in the British Medical Journal has received an enormous amount of publicity. In a well-designed protocol, investigators studied the effect of a low carbohydrate diet on energy expenditure. Traditional thinking is a calorie is a calorie whether it comes from protein, fat or carbohydrate. The researchers found, however, that subjects consuming a low carbohydrate diet...
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Posted by Dr. Robert Portman on 10/29/2019 to Performance Tip Of The Week
Posted by Dr. Robert Portman on 10/23/2019 to Performance Tip Of The Week
VITAMIN D: The Endurance Vitamin – Part 1 discussed the role of Vitamin D on endurance performance. Normal levels of Vitamin D range from 20 to 50 ng/ml. However a recent study suggests that athletes who have Vitamin D at the upper range of normal have improved endurance performance. The study, reported by researchers at Virginia Commonwealth University, showed a direct relation between Vitamin D levels and cardio respiratory fitness. What makes this research compelling is...
Posted by Dr. Robert Portman on 10/16/2019 to Performance Tip Of The Week
All vitamins are essential but one, vitamin D may be particularly important for endurance athletes. Vitamin D is best known for its role in building healthy bones. Vitamin D is essential for calcium absorption. However a number of studies have shown that vitamin D plays an important role in enhancing endurance performance. For example...