Heart rate variability in cross-country skiers with different level of maximum oxygen consumption

AIM: This research aimed to study heart rate variability (HRV) in cross-country skiers with different levels of maximal oxygen consumption (VO2max).
 MATERIALS AND METHODS: HRV analysis was carried out using the Ecosan-2007 (Medical Computer Systems, Russia) complex 52 from Komi Republic team (candidates for master sports and Russia). The Oxycon Pro ergospirometric system (Erich Jaeger, Germany) used calculate VO2max. To identify patterns individuals VO2max, volunteers were divided into two groups: VO2max up 4400 ml/min (n=27) over (n=25). MannWhitney U-test ascertain whether differences between groups statistically significant. A Spearman correlation test analyze relationship HRV.
 RESULTS: Athletes showed significant several indicators as follows: absolute values LF VLF waves, relative value HF LF/HF, IC indices. Correlation indicated presence a negative MxDMn, MxRMn, IC, power LF, LF%. waves. Furthermore, positive observed HF%. VO2max/kg TP, VLF, IC; HF%.
 CONCLUSION: In skiers, identified parameters. Compared lower those higher had more efficient mode regulation.