How does hydration affect muscle definition and vascularity?

Proper hydration makes muscles look fuller.

Water supports glycogen storage in muscle

Hydration improves blood volume

More glycogen better muscle roundness.

Sodium and water balance matter together

Cell hydration pushes muscle against the skin

Dry muscles look smaller not sharper

Hydrated skin looks tighter.

Consistent hydration beats short term water cuts

Vascularity depends on plasma volume.