Debra sorry to gatecrash your topic.
Interesting Paul J-R, I have had a slightly painful right calf since the end of July. It doesn't effect my running but is always there. When running it doesn't get any worse, but it gets slightly tighter after a run.
I try to stretch more often, before runs, after runs and on rest days. The only time it disappears is when my PT assists in my stretching.
Prior to taking up exercising and gym work in March/April I experienced very tight hamstrings, especially whilst sleeping/resting which I put down to my back injury (slipped disc in 2007 L3/L4). My PT has worked on my flexibility and my hamstrings have improved and rarely cause me any issues.
I have reduced my salt in-take considerably since the beginning of the year. I no longer add salt to meals or use it in cooking. I do not conciously eat low salt meals, so if its present in food then its my only salt in-take.
I only started running during July, prior to that it was a mixture of walk/run sessions on the treadmill. The calf problem started prior to my starting to run outdoors and has not got any worse with outdoor running.
The only way I can describe the feeling is that it feels like the calf is just about to cramp up. It doesn't but it feels like is about to?
I drink plenty of water/tea/orange and eat plenty of fruit (oranges/apples).
Could this just be down to a deficiency of salt?