Research Article

The Effects of Guided Imagery on Heart Rate Variability in Simulated Spaceflight Emergency Tasks Performers

Table 2

Summary of HRV indices in frequency domain of control group and imagery group with the two techniques.

IndicesTraining techniquesControl groupImagery group value of training technique value of imagery training value of interaction effect

VLFIGI473.1 ± 102.8876.1 ± 171.8   0.279   0.011   0.676
SGI594.3 ± 150.81147.7 ± 266.8

LFIGI491.0 ± 41.6707.9 ± 118.4   0.540   0.044   0.715
SGI522.6 ± 92.5832.6 ± 209.9

HFIGI243.5 ± 26.9421.9 ± 109.1   0.603   0.005   0.241
SGI176.9 ± 26.3593.3 ± 174.5

LF/HFIGI2.18 ± 0.262.00 ± 0.26   0.085   0.473   0.787
SGI3.00 ± 0.332.60 ± 0.65

TPIGI1207.4 ± 112.92005.9 ± 304.0   0.334   0.004   0.477
SGI1294.1 ± 190.62573.8 ± 585.4

LFNUIGI67.09 ± 2.1065.40 ± 2.56   0.505   0.126   0.295
SGI72.91 ± 3.1064.10 ± 5.11

HFNUIGI32.91 ± 2.1034.60 ± 2.56   0.505   0.126   0.295
SGI27.09 ± 3.1035.90 ± 5.11

Note: (1) standard errors are shown in parentheses;
(2) IGI was short for instructor-guided imagery, and SGI was short for self-guided imagery.