Table 1.
Effect of exercise training on baseline HRV and ECG variables
|
Ex |
Sed |
|||
|---|---|---|---|---|
| Pre | Post | Pre | Post | |
| HR, beats/min | 113.9 ± 4.3 | 104.3 ± 4.3* | 112.6 ± 7.5 | 116.6 ± 4.7 |
| HF, ln ms2 | 7.1 ± 0.2 | 8.2 ± 0.2* | 7.4 ± 0.5 | 7.0 ± 0.6 |
| R-Rsd, ms | 61.3 ± 4.0 | 100.5 ± 9.2* | 62.2 ± 7.0 | 63.6 ± 7.3 |
| R-Rrange, ms | 225.3 ± 13.4 | 276.2 ± 12.1* | 226.8 ± 21.7 | 194.6 ± 11.7 |
| R-R, ms | 524.7 ± 33.9 | 587.1 ± 22.3* | 556.8 ± 40.7 | 522.1 ± 21.5 |
| P wave, ms | 46.1 ± 1.6 | 45.8 ± 1.8 | 45.8 ± 1.1 | 49.3 ± 2.0 |
| PR, ms | 112.2 ± 3.8 | 116.3 ± 3.9 | 116.0 ± 3.7 | 120.8 ± 2.8 |
| QRS, ms | 72.4 ± 2.2 | 69.9 ± 2.2 | 75.2 ± 3.6 | 73.6 ± 3.7 |
| QTc, ms | 250.7 ± 4.3 | 253.3 ± 2.8 | 256.6 ± 3.8 | 256.0 ± 4.1 |
| cTp-e, ms | 87.8 ± 3.9 | 77.6 ± 2.4* | 77.6 ± 4.5 | 81.2 ± 3.7 |
HRV, heart rate variability; ECG, electrocardiographic; Ex, exercise-trained group; Sed, sedentary group; Pre and Post, before and after the 10- to 12-wk study period, respectively; HR, heart rate; HF, high-frequency component of the R-R variance (0.24 to 1.04 Hz); R-Rsd standard deviation from the total R-R interval variance; R-Rrange, longest-to-shortest R-R interval; QTc, QT interval corrected for heart rate (van de Water's correction factor; see Ref. 60; e.g., QTc = QT − 0.087(R-R − 1,000); cTp-e, Tpeak-Tend corrected for heart rate.
*
P < 0.05 pre vs. post.