Ergonomic training paddle with reduced finger slippage

A swim training apparatus for use on a hand of a swimmer in water during a swimming motion, said training aid apparatus comprising:

• a plate member having a first surface and an opposed second surface and a leading edge and a trailing edge, the opposed first surface and second surface being separated by a leading edge on one end of the plate member, and by a trailing edge on an opposite end thereof;
• said plate member being formed to mount to the swimmer's hand the first surface contacting the players hand;
• at least two elastic strips each forming separate arcs on the first surface, with ends of the elastic strips extending through the plate member and out of the second surface;
• the plate member configured to cover all of the phalanges and at least some of each of the metacarpal bones in hands of swimmers secured to the plate member by the two elastic strips and have an area inset into the plate allowing the wrist above the ulna such that flexing and pronating of the wrist while the hand of the swimmer is secured by the at least two elastic strips without the trailing edge being forced into a wrist of the swimmer within 2 cm of the ulna;
• wherein an absolute force of ten pounds applied by the swimmer's hand secured to the plate member against a bar held flat against the second surface and extending midway under two midpoints of two adjacent metacarpal bones, including a metacarpal bone of the middle finger, will cause a deflection of the leading edge and a contact point of the bar with the plate member under the metacarpal bone of the middle finger is less than 4 cm, and wherein the first surface has four straight grooves each groove having a bottom and elevated sides along passing from a base of the first surface adjacent the wrist towards a top of the first surface where fingertips extend, wherein height of the elevated sides is at least 1 mm higher than a lowest point of the bottom of the groove.