All Doctor of Philosophy (DPhil) students must write an acceptable research proposal. This has a clear and explicit purpose: it makes certain that you have a worthwhile research project - you have a good grasp of the relevant literature and the major issues, and that your methodology is sound;
If the above tonic helps relieve your leg cramps, try to boost your potassium levels by eating more of these potassium-rich foods: apples, bananas, dried fruits, avocado, mushrooms, yogurt, kefir, spinach, tomatoes, mushrooms, baked potatoes and cantaloupe.
A common cause of leg cramps is a deficiency in some kind of electrolytic mineral, oftentimes potassium or magnesium. Either your diet is not rich enough in these minerals for physical activity or the physical activity itself is the cause.