At Nitro Gym, you can get stronger and fitter. But training can’t tell you if you’re low on vitamin D. A lot of people in Dubai are indoors most of the day, so they hardly get any sun. Some also don’t eat much food that has vitamin D in it. So if you feel tired, weak, or sore for no reason, don’t just ignore it. Eat a few more foods with vitamin D, and ask a healthcare professional about a blood test. That’s the easiest way to know for sure.