Variable resistance aquatic device and methods of using the same

An aquatic device comprising:

• a foot-receiving member having a foot compartment and at least one sidewall, the sidewall having a top surface, a lower surface, and a leading edge surface that extends continuously between the top surface and the lower surface of the sidewall, the leading edge surface includes an upper face and a lower face, the upper face intersects width the top surface, the lower face intersects with the upper face at a first angle and extends toward the lower surface;
• a fin member rotationally coupled to the foot-receiving member, the fin member having at least one sidewall with a fin top surface, a fin lower surface, and a fin trailing edge surface that extends continuously between the fin top surface and the fin lower surface, the fin trailing edge surface includes a fin sidewall upper face and a fin sidewall lower face, the fin sidewall upper face intersects with the fin top surface, the fin sidewall lower face intersects with the fin sidewall upper face at a second angle and extends toward the fin lower surface.