Biomechanical analysis is frequently applied in elite swimming with intent to optimise competition performance. When applied to breaststroke swimming, biomechanical analysis has previously revealed kinematic and neuromuscular activation patterns associated with performance excellence. To provide coaches, athletes and applied sports practitioners with additional insight into the biomechanical factors associated with elite breaststroke swimming performance, this thesis investigated three topic areas of applied biomechanics that have not been investigated heavily within the existing scientific literature. Specifically, this thesis aimed to evaluate the relationships of temporal characteristics, path patterns of the hand, knee and foot, and physical attributes with breaststroke performance in an elite breaststroke population. [...]