Say for example you eat a sausage barm, what do you need shortly after it? A drink, that’s because it’s high in salt.
Think of a muscle as dried spaghetti, what happens when it’s wet , it goes soft or in a muscles sense it does loose, the salt in meat dries out muscle.
The muscles are made of tiny fibres, they need hydration to function, otherwise the become dry, tight and short, when muscles are tight and short the fibres break.
Take that out of your diet, and add hydration and less tears.
Second part is a bit out of my wheelhouse and more of a dieticians expertise but I do know veg can be hard to digest but that’s not always a bad thing because it canbe slow release, and slowly release water, vitamins and minerals, so there must be a chemical reaction why it’s more beneficial.