Cross-country skiing (XC skiing) is an endurance sport that demands proficiency in various techniques tailored to different terrains and conditions. Para cross-country skiing, specifically tailored for athletes with physical impairments, requires advanced biomechanical and technological adaptations, particularly for those using prosthetic limbs. This thesis examines the performance and biomechanics of a standing para-athlete performing classical XC skiing on a treadmill, focusing on the interaction with the prosthetic equipment. The prosthetic devices tested included the Genium X3 and Genium X4 knee systems (Ottobock ©) and Taleo and Evanto prosthetic feet (Ottobock ©). Inertial Measurement Units (IMUs) were employed to estimate joint angles and detect pole hits and lifts.