Heat is one of my favorite recovery tools. It seems like it is so much easier to apply ice/cold but it can be tough to apply heat. I tried various hot pads, hot stones, etc. but I never got the results I was looking for. I even tried putting hot water in bottles and holding it on muscles but I do not recommend doing this since you can get burned. I tried hot stones and they were great but they end up getting cold really quick. My physical therapist recommended a using a electric moist heating pad. This thing is a life saver and great tool to use. You want to make sure you buy a one that be used with a sprayed water bootle (moist electric pads) since the water helps with the heat go in deeper. Most drugstores cary these pads. I use this pad to heat up some of the tight muscles before a workout or just to help with recovery after a workout. It is also a great tool to loosen certain muscles before a rolling session or self massage.