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Table 2 The heart rate variability in both groups at different stages

From: Nicotine supplementation enhances simulated game performance of archery athletes

Outcomes Condition Time Condition effect Time effect Condition x Time
S1 S2 S3 S4 S5 p ηp2 p ηp2 p ηp2
HR (bpm)        .028 .474 <.001 .815 .039 .319
  PLA 82.23 ± 6.50 82.50 ± 6.83 79.75 ± 5.96 95.41 ± 5.33aaa 81.72 ± 6.85       
  NIC 79.51 ± 5.15 84.49 ± 6.85a 84.24 ± 8.14 101.70 ± 8.04aaa,## 87.85 ± 9.53a       
pNN50 (%)        .229 .175 <.001 .562 .023 .290
  PLA 14.16 ± 7.83 13.26 ± 9.94 18.37 ± 10.05 5.56 ± 3.63aa 17.03 ± 9.56       
  NIC 18.86 ± 9.94 8.77 ± 5.16aa 13.08 ± 6.40 5.25 ± 2.82 aa 12.21 ± 8.21       
LF(n.u.)        .371 .081 .008 .396 .588 .067
  PLA 68.30 ± 7.22 69.41 ± 7.55 64.62 ± 8.00 77.39 ± 12.74a 61.63 ± 11.14a       
  NIC 65.56 ± 12.90 72.01 ± 8.11a 68.33 ± 9.10 77.52 ± 10.05 aa 65.35 ± 10.56       
HF(n.u.)        .371 .081 .008 .396 .588 .067
  PLA 31.70 ± 7.22 30.59 ± 7.55 35.38 ± 8.00 22.61 ± 12.74a 38.37 ± 11.14a       
  NIC 34.44 ± 12.90 27.99 ± 8.11a 31.67 ± 9.10 22.48 ± 10.05aa 34.65 ± 10.56       
LF/HF        .655 .021 .002 .565 .516 .065
  PLA 2.44 ± 0.75 2.61 ± 0.81 2.14 ± 0.91 5.28 ± 3.31a 2.02 ± 1.00       
  NIC 2.26 ± 0.98 3.15 ± 1.17a 2.70 ± 1.58 4.73 ± 2.04aa 2.33 ± 0.83       
  1. Values are presented as the mean ± SD
  2. ηp2 Partial eta squared
  3. a p < 0.05, aa p < 0.01, aaa p < 0.001 compared to S1 in each group
  4. ##p < 0.01 compared to the PLA group