PMID- 25029000 OWN - NLM STAT- MEDLINE DCOM- 20150824 LR - 20181202 IS - 1533-4287 (Electronic) IS - 1064-8011 (Linking) VI - 29 IP - 4 DP - 2015 Apr TI - Autonomic response to tactical pistol performance measured by heart rate variability. PG - 926-33 LID - 10.1519/JSC.0000000000000615 [doi] AB - This study evaluated changes in autonomic tone during a tactical pistol competition. At rest and during a match, heart rate variability (HRV) was examined in 28 healthy subjects. Heart rate variability time-domain variables (including interbeat interval [IBI]) and frequency-domain variables (low frequency [LF], high frequency [HF], total power [TP]) measured during shooting were subtracted from those measured during rest to produce Deltas. The shooting task involved several, rapid tactical maneuvers. Raw time to completion and inaccurate shots (points down [PDs]) were recorded and combined to form a match score where lower values indicated superior shooting performance. Mean (+/-SD) raw time was 135.9 +/- 34.1 seconds, PDs were 78 +/- 34, and match score was 175.3 +/- 39.8. Shooting decreased IBI (i.e., increased heart rate) and LF. DeltaLF, DeltaHF, and DeltaTP were independent of DeltaIBI. Raw time was significantly (p