In osteoarthritis and rheumatoid arthritis, the excess fluid that surrounds inflamed cartilage cells can dilute the sodium level in those areas, which may lead to further pain. Thus, low- salt diets may worsen cartilage health in both those with and without autoimmune diseases, decreasing their ability to protect joints and increasing joint pain, especially during exercise.Thus, low- salt diets can be a triple whammy for runners— they lose salt from their sweat, from the fluid surrounding their cartilage cells, and even from within the cartilage cells themselves.
--- Does the part "from the fluid" probably mean the same as "as a result of the fluid ..." or "because of the fluid ..."?
It's a bit confusing as the word 'from' seems to mean different things in the first and third element of the list. As it's impossible to read 'as a result of' in place of 'from' in the third element of the list, it seems unlikely to mean 'as a result of' in the second element. However, I can see the contextual sense that 'as a result of' would make and 'from their sweat' means 'as a result of them sweating', so I wouldn't like to say for certain which way it is meant to be read!
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It's a bit confusing as the word 'from' seems to mean different things in the first and third element of the list.
As it's impossible to read 'as a result of' in place of 'from' in the third element of the list, it seems unlikely to mean 'as a result of' in the second element.
However, I can see the contextual sense that 'as a result of' would make and 'from their sweat' means 'a