Is there any certain food or food supplement, warm up, that can help prevent myalgia pain?

Many types. Myalgia pain is varied. It depends if the problems that you have are localized or widespread. Has there been a diagnosis of fibromyalgia? Do you get it often when exercising (which I often do as a runner.) stretching can help, but too little or too much can create problems too. Yoga and warm water aerobics are often very helpful.