en فيزيولوژی ورزشی و شاخه‌های وابسته بدان Sport Physiology and its related branches مقاله اصیل Original Article <div dir="ltr" style="text-align: justify;"><span style="font-size:12px;"><span style="font-family:times new roman;"><strong>Objectives. </strong>The purpose of this study was to assess the heart rate variability (HRV) during off-snow and on-snow training in an elite female alpine ski racer.<br> <strong>Methods. </strong>Using a case study design, a single elite female alpine ski racer (25 years old; 175.6 cm; 69.9 kg) was recruited from the Canadian Alpine Ski Team. Training load was obtained using the sessional rating of perceived exertion method (sRPE), and a weekly sum was calculated using all training loads in a calendar week. Resting heart rate was recorded upon waking using a heart rate monitor. HRV was calculated using the natural logarithms of the root mean square of the successive differences of R-R intervals (lnRMSSD), and the coefficient of variation of lnRMSSD (lnRMSSDCV) with smallest worthwhile change (SWC). Compliance was 19.53%.<br> <strong>Results. </strong>An inverse relationship was identified between the extreme values for lnRMSSD and sRPE. Daily lnRMSSDCV found two time-points that were significantly greater than SWC. The regression analysis of daily lnRMSSDCV over time had a positive slope of 0.001 (R = 0.0029). Three major depressions in lnRMSSD were observed over the recording period and two coincided with peak sRPE. The largest depression occurred on the same day the subject sustained a shoulder dislocation during a routine strength training session. The subject maintained training status over the training period but it was not predictive of future performance.<br> <strong>Conclusion. </strong>In this case study, the low compliance limited the ability to identify possible relationships; however periods of functional overreach were identifiable.</span></span></div> Alpine Ski, HRV, Training, Variability, Overreach 3 10 http://aassjournal.com/browse.php?a_code=A-11-610-1&slc_lang=en&sid=1 Sean Wallace sdwallac@ucalgary.ca, 10031947532846004201 10031947532846004201 No Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada Matt Jordan mjordan@csicalgary.ca 10031947532846004202 10031947532846004202 No Cumming School of Medicine, Department of Medical Sciences, University of Calgary, Calgary, Alberta, Canada. Canadian Sports Institute, Calgary, Alberta, Canada Tracy Blake tblake@ucalgary.ca 10031947532846004203 10031947532846004203 No Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada Patricia Doyle-Baker pdoyleba@ucalgary.ca 10031947532846004204 10031947532846004204 Yes Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada. Faculty of Environmental Design, Calgary, Alberta, Canada