Table 3.
Mean change from pre-test to post-test in state anxiety scores [Spielberger State-Trait Anxiety Inventory (STAI-S)] and heart rate variability data for two groups (N = 72)
| Measure | Experimental group (n = 35) |
Control group (n = 37) |
t | p-value |
|---|---|---|---|---|
| Mean change (SD) | Mean change (SD) | |||
| State anxiety score (STAI-S) | −5.29 (6.74) | 0.65 (4.40) | −4.40 | <0.001 |
| Heart rate (beats min−1) | −4.71 (2.26) | −0.84 (2.92) | −6.28 | <0.001 |
| LF norm (n.u.) | 2.06 (15.88) | −1.04 (14.19) | 0.87 | 0.39 |
| HF norm (n.u.) | 8.63 (14.45) | −2.74 (13.15) | 3.50 | 0.001 |
| LF/HF ratio | −0.55 (1.50) | −0.02 (1.10) | −1.71 | 0.09 |
HF, high frequency; LF, low frequency; SD, standard deviation; n.u., normalised unit.