Table 3. Specification and description of the parameters of the body segments mutual displacement in fin swimming turn technique, recorded and analyzed during the research. Tuck Index Max Knee flexion Point when the hip was at its minimum distance from the wall during foot contact and was expressed as a percentage of the trochanteric height Angle of the knee flexion at the moment of Tuck Index estimation Push-off Angle Angle between the longitudinal axis if the swimmer’s body and the horizontal line at the moment when the feet lost contact with the wall. Glide Angle Angle between the longitudinal axis if the swimmer’s body and the horizontal line at the moment of the knee joints extension begins after push-off.