Magnesium relaxes the muscles and candida causes a serious deficiency. Also vitamin c and EFA's are extremely important here. Tightness is lack of magnesium for relaxation of muscles and inflammatory reponse from toxins.
Vitamin c and EFA's work great for inflammation. Also , try enemas to get rid of toxins to begin with and then your body will have less inflammation.
Apparently pratically all illness symptoms can be attributed to inflammation. Inflammation comes directly from candida toxins. Of course there are other causes. But candida toxins do alot of damage.