INTRODUCTION: Alpine skiing needs tools that enable it to be evaluated in situ. GPS (Global Positional System) provides Information of performance in real time that can be recorded for subsequent analysis. It has been used in alpine skiing on several occasions (Limpach & Skaloud, 2003; Ducret, S. et al., 2006). This study sets out extremely useful data for trainers obtained by using GPS in the control of skiers' training. METHOD: Eight female skiers (17.3 ± 1.16 years), selected from the Juvenile "C" Ladies' Alpine Skiing Team of the Royal Spanish Winter Sports Federation, were analysed during the 2006-2007 season. GPS FRWD receptors from Series F500 (FRWD Technologies Ltd.) with the corresponding Software were used. RESULTS AND DISCUSSION: The analysis Software provided information about heart rate (HR) and its relation to cinematic parameters (velocity, position, slope inclination) of the giant training (Fig. 1). Each peak of HR corresponded to one run. Knowing the importance of anaerobic training in performance in alpine skiing (White & Johnson, 1991), the HR peaks indicated whether or not the skier was training at the desired intensity. Equally, the increase in velocity was related directly to an increase in HR and indirectly with a reduction in the slope. It was evident that when the angle of inclination of the sloe was less the descent tended to be faster (more open curves) and when the angle of inclination of the slope was steeper the descent tended to be slower (more closed curves), in accordance with the indications of the regulations of the configuration of the course. CONCLUSION: Collecting Information of skiers' training through GPS and its Interpretation provides more and better knowledge of the sport and, more particularly what happens in the skier's training. The analysis of the cinematic and biomedical variables reveals the direct relationship between velocity and heart rate and an indirect relation with the angle of inclination of the piste, so that both must be taken into account to evaluate the intensity of the training carried out and/or to determine the aims of performance.
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