This project aims to investigate the impact of high-performance legwear on repeated jumping performance and lower limb muscle power output. The study will focus on the performance of key muscles during repeated countermovement jump, to provide crucial information for the design of high-performance legwear that offer optimal elasticity and compression levels for lower limb muscle power delivery to the skeleton. It will be conducted in three phases: 1) examining jump performance and lower limb muscle power output with three experimental garments, 2) modelling and quantifying the interaction between lower limb joint and muscle activation timing during jumps for the newly high-performance legwear design, and 3) evaluating the effects of newly high-performance legwear with market sample by a comprehensive biomechanical study. The goal is to optimize the high-performance legwear design to maximize the repeated jump performance, aid recovery, and reduce injury risk.