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The Take it Slow config screen, showing options for "Enable Take it Slow", "Allow Swimming", "Swim Speed Scale", "Allow Sprinting/Swimming in Creative/Spectator Mode", "Allow Swimming in Flight", and "Allow Swimming While Passenger"
A player swimming underwater
A player riding a camel
"Key Binds" screen, displaying the Movement category with the "Toggle Take it Slow" key bind set to "Not Bound"

Disables sprinting and, optionally, swimming