Adeficiency of carnitine results in muscle cramps, which are increased by exercise or fasting. (hint: atp is needed for muscle contraction. in the absence of enough atp, muscles will cramp).what is the role of carnitine in atp production? write the reaction in which carnitine is involved. give a biochemical explanation why the cramping increases during fasting. give a biochemical explanation why the cramping increases during exercise.