I'm taking a high dose magnesium supplement too actually - only this is termed "leg cramp" supplement. According to the pharmacist it can assist in sleeping ...while I have restless legs as the primary issue, I also have been diagnosed at Mayo with fibro (which I may have mentioned before) and chronic fatigue. However, if I can sleep my fibro can go up to two-three months without a flare if I take care. Without sleep it feels like everything goes downhill fast. I too like to use ice and hot showers or baths; however, I haven't thought of the closely timed heat and ice regime. Thanks for that tip!