Study Suggests Vitamin D Supplements Increase Speed on the Bike
The UK-based Society for Endocrinology published this study that shows how vitamin D can improve your cycling performance. The study was conducted by Queen Margaret University in Edinburgh, where they gave 13 healthy adults with the same age and weight, 2,000 IU of vitamin D or a placebo per day over a period of two weeks. After the two week period these were some of the findings:
“A fitness test found that the group taking vitamin D could cycle 4 miles in 20 minutes, compared to just 3 miles at the start of the experiment. Despite cycling 30% further in the same time, the group taking vitamin D supplements also showed lower signs of physical exertion.”
Though the test group was small, the results are significant. Vitamin D acts as both a vitamin and a hormone and is usually generated by ultraviolet B rays in sunlight. Vitamin D is important in controlling levels of calcium and phosphate, essential for the formation of bones and teeth, and recent studies show that it can also reduce circulating levels of cortisol; high levels of cortisol can raise blood pressure by restricting arteries. The findings of this study also showed that the participants taking vitamin D had lower blood pressure than the placebo group and lower levels of cortisol in their urine. If you want to experiment yourself with vitamin D, make sure you’re taking at least 2,000 IU. You can buy a bottle of Vitamin D at Trader Joe’s, each soft gel is worth 1,000 IU so you’ll only have to take two a day.