Vitamin D: A Strong Supplement

As a long time gym-goer, I recently enrolled in a "Fitness Challenge" at my gym. Over a 90 day period I will be tested on, amoung other things, my strength and endurance. Not knowing if my multivitamin alone would be enough, I started looking into other vitamins that might help me in this challenge.
An ever-growing body of science supports the benefits of adequate vitamin D levels throughout life. A deficiency of this vitamin is linked to osteoporosis, muscle weakness, fractures, common cancers, autoimmune diseases, infectious diseases and cardiovascular diseases. One particular study found that vitamin D is positively related to muscle power, force, velocity and jump height in adolescent girls. There are similar findings in people over the age of 65. Seniors with too little vitamin D were found to have differences in both a physical performance, which includes things such as walking speed, chair stands and a balance test, as well as differences in grip strength.
Vitamin D can be obtained from sun exposure, food, and supplements.

-Community Assistant