Table 1.
Body weight, heart rate and cardiac function of control and trained rats during the 3-month training period. Results are presented as mean ± SD.
| Control (n=8) | Trained (n=12) | |||||||
| Month | Month | |||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| BW, g | 306 ± 24 | 326 ± 23 | 368 ± 28 | 370 ± 21 | 302 ± 19 | 321 ± 24 | 347 ± 23 | 350 ± 37 |
| HR, bpm | 408 ± 33 | 420 ± 15 | 400 ± 36 | 423 ± 21 | 420 ± 13 | 410 ± 17 | 422 ± 14 | 417 ± 19 |
| LVEF, % | 54.8 ± 1.9 | 55.1 ± 1.8 | 53.7 ± 1.6 | 52.3 ± 0.9 | 52.6 ± 1.8 | 54.9 ± 1.9 | 54.5 ± 1.9 | 52.7 ± 0.9 |
| LVFS, % | 24.8 ± 1.1 | 24.9 ± 1 | 24.1 ± 1 | 23.3 ± 0.4 | 23.3 ± 1.1 | 24.8 ± 1.1 | 24.5 ± 1.2 | 23.5 ± 0.5 |
| VCF, circ/sec | 19.7 ± 1.7 | 20.2 ± 0.8 | 20.8 ± 1.7 | 17.4 ± 0.5 | 18.5 ± 0.6 | 21.1 ± 0.5 | 17.5 ± 1.8 | 17.6 ± 0.8 |
| IVRT, ms | 20.8 ± 3.1 | 21 ± 1.2 | 20.4 ± 1.5 | 21 ± 1 | 19.7 ± 2.1 | 20.3 ± 1 | 22.4 ± 1.6 | 22 ± 1.6 |
BW, body weight; HR, heart rate; IVRT, isovolumetric relaxation time; LVEF, left ventricular ejection fraction; LVFS, left ventricular fractional shortening; VCF, velocity of circumferential fiber shortening.