Swimming assistance apparatus

A swimming assistance apparatus comprising:

• a body part made of a floatable material or having a hollow tube which floats on water;
• a fitting hole having a hollow cylinder shape and defined through the body part to surround a first part of a user's lower body;
• a cut part defined on at least one side of a wall of the fitting hole and having a slot receiving the first part of the user's lower body into the fitting hole;
• and
• a depressed part defined on upper and lower sides of the body part,
• wherein:
• the fitting hole comprises a first fitting hole and a second fitting hole and the user can insert the right and left legs into the first and second fitting holes respectively,
• the depressed part defined between the first fitting hole and the second fitting hole of the body part, having a predetermined depth such that a second part of the user's lower body is pressed toward or fixed on the depressed part, the second part comprising at least a portion of knees, thighs, or parts between the knees and thighs, and
• when the user swims with the swimming assistance apparatus and when the first part of the user's lower body is inserted into the fitting hole, the user's lower body floats on water by buoyancy of the body part and underwater resistance is decreased by the depressed part.