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The purpose of this study was to evaluate force characteristics of impact during kicking rugby balls of different size and inflation pressures and with different foot-ball contact positions. A mechanical kicking limb struck rugby balls of sizes 3 (smallest), 4 and 5 (used in senior competition). Foot and ball speed, contact time and distance and impact forces were calculated from 2D high speed video (4000 Hz). Overall, average contact force decreased as the ball size decreased. Decreasing inflation pressure also decreased average contact force. Finally, contacting the ball in the middle section produced lower forces than for similar kicks contacting the point of the ball. Manipulating ball size, inflation and contact position provides a platform for progressive kick-specific conditioning.