Abstract: A training weight aid for a sports racquet having longitudinal strings and lateral strings strung to span its head frame and creating interstices framed by said strings has a pair of opposed shells interengaged with the strings on opposite sides thereof to provide a shell assembly within the head of the racquet. Longitudinal and lateral rows of spaced apart, shell nub projections, dimensioned and spaced to be received by the strings, extend axially into the space interstices such that many are in lateral gripping engagement with the strings. A pair of disengageable fasteners extend axially through the string space interstices to axially lock the shells together in opposing relation on the strings.