INTRODUCTION: Alpine skiing is influenced by a combination of physiological/functional parameters and psychological decision-making. Factors such as muscular strength, agility, balance, coordination, flexibility, anaerobic and aerobic capacities play a crucial role in alpine ski-racers performance 1. The purpose of this study is to evaluate the most important capacities at the beginning and at the end of the off-season periodization. Skiing performance on a slope was also checked. METHODS: Data collection were performed in July and October 2022. Following devices were used for corresponding tests: CronoJump ® for different standing jumps; sensor insoles (Moticon.de ®) for leg press (unilateral/bilateral), Isometric dynamometer 2 for trunk muscles forces; load cells for knee extension /flexion. 20 athletes, 10 male (age: 17.9 ± 2.3 years, BW: 75.5 ± 10.6 kg) and 10 females (age: 17.6 ± 2 years, BW: 61.6 ± 8.6 kg), volunteered in this study. All subjects are advanced alpine skiers. After a warm-up, the measurement starts with the Bosco Test (SJ, CMJ, DJ, 45sJ). After a complete recovery (HR to basal level) the athletes performed single and double isometric push at the leg press (knee angle 110°). The trunk test consisted in isometric flexion/extension on sagittal and frontal plane. Finally, the athletes performed single leg isometric flexion/extension at the knee machine (knee angle 90°). Reaction forces during slalom were acquired by sensor insoles. RESULTS: The main results are presented in Table 1 as average values. DISCUSSION/CONCLUSION: for all subject SJ and CMJ increased but 45sJ slightly decreased. Both leg press and knee tests show an increment for males and decrement for females. Selecting subgroups according to the best scores of leg press the variations show a different behavior. This correlates partially with forces during skiing.
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