Thought I recognised the images Merkurologist (from your previous posts); yes no social distancing applies on Bournemouth beach, unfortunately! As you are aware, if you walk 200 metres from Shore Road towards the Haven Hotel, you will find it deserted; as usual, no one can be bothered with the walk! Swimming and cycling, almost a triathlon!
Hope it's cleared up now - must say I have never heard about this, of course hydration is very important especially on long runs. That reminded me, as kids we'd never heard of hydration, ok we didn't cycle seriously but did long rides. It was more likely we had a fag than a drinkAnd remember folks to stay hydrated!
Had a kidney stone removed earlier in the year. My doctor thought cycling was likely to blame. You can get dehydrated very easily on long runs. Over time that increases the risk of a stone.
Kidney stones hurt. A lot. At one point I was written up for morphine...