A swim fin assembly is configured to allow changing a swim fin and reduce leg strain of a human user. The swim fin assembly includes a leg portion, attached to a foot portion, and configured to accommodate a human leg and foot of the human user. A rear support is attached to the leg portion and further attached to a rear bracket. A fin attachment bracket is connected to the rear bracket. Inserting the swim fin into the fin attachment bracket enables a user to swim with reduced leg strain.