Looked this up & found nothing & perhaps it may even be in the wrong forum area. Living in KY (meaning mostly fresh water diving), & wanting to dive year round, means that I must do cold water diving. Whether the water is cold from seasons or form depths (most fresh water here stays at about 45- 42 degrees year round below 50 ft). I find sometimes when I'm cold water diving, I have some problems with my calves cramping up. It's not usually a major issue, I just stop. stretch my cramping leg out & then continue on. When I'm doing this cold water diving, I dive a drysuit & I am typically in double tanks & have to use SP Jet Fins to be able to push myself through the water. I have dove this same configuration in warmer waters without any problems. Anyone else have this problem? Any reasons why this may be happening? Any suggestions to prevent it? Thanks all.