Table 5.
Changes in Heart Rate Variability Time-Domain Variables Between Pre- and Post-Intervention Tests in Obese Women
| Variable | EXP | CON | p value (η2) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Pre-Test | Post-Test | Mean Difference (Lower, Upper) | Pre-Test | Post-Test | Mean Difference (Lower, Upper) | T | G | I | |
| SDNN (ms) | 26.37 ± 17.05 | 30.59 ± 15.03 | 4.22 (−3.14, 11.59) | 26.07 ± 11.12 | 26.73 ± 6.84 | 0.66 (−4.02, 5.34) | 0.240 (0.049) | 0.636 (0.008) | 0.388 (0.027) |
| RMSSD (ms) | 22.10 ± 14.21 | 32.53 ± 17.55 | 10.43** (3.63, 17.22) | 26.11 ± 12.13 | 28.92 ± 12.49 | 2.82 (−5.37, 11.00) | 0.013† (0.203) | 0.965 (0.000) | 0.136 (0.078) |
| NN50 (beats) | 25.67 ± 41.61 | 49.71 ± 58.46 | 24.04* (6.45, 41.63) | 27.53 ± 37.29 | 30.27 ± 34.82 | 2.73 (−18.23, 23.70) | 0.045† (0.136) | 0.556 (0.013) | 0.106 (0.091) |
| PNN50 (%) | 6.93 ± 11.54 | 14.63 ± 16.42 | 7.70* (2.06, 13.34) | 7.84 ± 10.47 | 9.30 ± 11.60 | 1.47 (−5.47, 8.40) | 0.036† (0.147) | 0.599 (0.010) | 0.146 (0.074) |
Notes: Values are expressed as mean ± standard deviation. †Significant interaction or main effect. *p < 0.05, **p < 0.01, significant difference between pre- and post-intervention tests.
Abbreviations: CON, control group; EXP, experimental group; G, group; I, interaction; NN50 count, the number of interval differences of successive NN intervals greater than 50 ms; pNN50, the proportion derived by dividing NN50 by a total number of NN intervals; RMSSD, the square root of the mean of the sum of the squares of the difference between adjacent NN intervals; SDNN, standard deviation of the interval; T, time.