Underwater paddle and vertical fin for swimmer

A swimming apparatus comprising:

• A) a paddle assembly for completely immersed operation, said paddle assembly comprising a shaft having a long axis, and an intermediate portion connecting two end portions, said intermediate portion arranged for gripping along said long axis by two hands of a swimmer and a pair of blades, one of said blades attached to each of said end portions, each of said blades having a thin resilient trailing portion extending rearward from said shaft in a single plane and a rigid leading edge portion coplanar with said trailing portion with both of said blades lying in a common plane when not exposed to external forces, said blades so constructed that forward, or return swimming stroke motion of one of said pair of blades, with said leading edge advancing, causes said trailing portion to remain flat in said plane for minimal hydrodynamic resistance, while the other of said pair of blades is in rearward or thrust swimming motion with said leading edge retreating which forces water against the trailing portion causing the trailing portion to bend the blade away from said single plane to only one side of said single plane for increased hydrodynamic resistance to enhance the effectiveness of alternating arm strokes;
• and
• B) a fin assembly comprising a pair of foot attaching elements for attaching to the feet of a swimmer and
• a thin, flat, resilient fin member directly connected to said foot attaching elements at a narrow, forward portion of said member, said fin member increasing in size as it extends rearward in the manner of a fish tail fin, said fin member lying in a vertical plane with said foot attaching elements closely juxtaposed on opposed sides of said vertical plane, said vertical swimmer into left and right halves when said foot attaching elements hold said swimmer's feet, said fin assembly arranged to maintain the feet of said swimmer in fixed, juxtaposed relationship while said feet are held in said foot attaching elements, and said fin member arranged to move from side to side for additional thrust by muscle action associated with operation of said paddle assembly.