4 RISK FACTORS FOR VITAMIN D DEFICIENCY
Vitamin D helps your body use calcium for building strong bones, has benefits for heart health, helps keep your immune system in top form, and helps keep you in good spirits. The good news is that your body can actually manufacture Vitamin D if you get enough exposure to natural sunlight.

But there are a number of risk factors that could be keeping you from getting enough

Vitamin D in your diet. Vitamin D only occurs naturally in a certain foods like fish, fish oil, eggs, and some fortified foods. That means that if you are following a strict vegetarian diet you might not be getting enough from food alone... READ >

Arm Lock from Guard - LUIGI MONDELLI
In this segment of BJJ Power Play Luigi Mondelli shows us some of the tricks he uses in setting up the arm bar from guard. By leaving his fist against his opponents neck and locking his legs tight before he swings around to set the submission, he helps to prevent an opponent from stacking to escape. There are a lot of details in this quick clip, check the grip, the hips, the hand position in the collar, the knees squeezing, and the finish.... WATCH NOW >