Table 3.
Effects of stretching on changes in isometric muscle force and electromyographic ctivity at the horizontal position.
| Dependant variable | Streching method | Pre | Post 0 min | Post 20 min | Post 60 min |
|---|---|---|---|---|---|
| Isometric muscle force at the horizontal position (Nm) | SS | 86.8 ± 17.1 | 77.6 ± 15.2 * | 79.8 ± 13.7 * | 79.4 ± 14.9 * |
| Relative change | - | -10.3 ± 7.2% | -7.4 ± 7.3% | -7.9 ± 9.5% | |
| DS | 86.0 ± 13.5 | 77.8 ± 15.2 * | 78.0 ± 14.1 * | 77.5 ± 15.0 * | |
| Relative change | - | -9.9 ± 5.7% | -9.4 ± 7.7% | -10.2 ± 7.9% | |
| SS-DS | 86.0 ± 17.7 | 77.1 ± 14.2 * | 77.4 ± 13.1 * | 76.3 ± 14.7 * | |
| Relative change | - | -9.8 ± 6.9% | -9.1 ± 7.4% | -10.6 ± 8.7% | |
| DS-SS | 85.4 ± 14.1 | 77.9 ± 14.0 * | 77.1 ± 14.3 * | 76.5 ± 13.9 * | |
| Relative change | - | -8.8 ± 6.3% | -9.8 ± 7.2% | -10.3 ± 7.8% | |
| RMS values (medial hamstrings) (μV) | SS | 324.4 ± 99.3 | 292.9 ± 93.6 | 282.2 ± 104.8 | 283.9 ± 116.0 |
| Relative change | - | -8.5 ± 16.2% | -10.4 ± 25.3% | -10.9 ± 26.9% | |
| DS | 314.8 ± 97.8 | 284.4 ± 77.7 | 272.6 ± 92.6 | 270.4 ± 101.3 | |
| Relative change | - | -5.3 ± 28.0% | -11.0 ± 24.3% | -9.4 ± 33.8% | |
| SS-DS | 312.2 ± 99.0 | 295.1 ± 87.7 | 289.4 ± 92.2 | 272.0 ± 90.9 * | |
| Relative change | - | -3.8 ± 17.4% | -6.4 ± 13.6% | -11.2 ± 18.0% | |
| DS-SS | 313.8 ± 121.9 | 294.9 ± 108.5 | 291.9 ± 100.7 | 290.3 ± 107.4 | |
| Relative change | - | -1.7 ± 25.0% | 0 ± 32.7% | -4.0 ± 20.2% | |
| RMS values (lateral hamstrings) (μV) | SS | 263.4 ± 115.4 | 247.0 ± 114.3 | 238.7 ± 111.9 * | 215.9 ± 77.7 |
| Relative change | - | -6.4 ± 17.4% | -9.5 ± 14.5% | -13.0 ± 22.2% | |
| DS | 231.7 ± 88.5 | 210.1 ± 79.5 | 197.3 ± 65.6 * | 209.3 ± 75.9 | |
| Relative change | - | -8.1 ± 16.5% | -10.8 ± 20.6% | -7.8 ± 16.1% | |
| SS-DS | 236.7 ± 83.5 | 222.4 ± 87.9 | 216.4 ± 73.2 | 214.4 ± 82.2 | |
| Relative change | - | -6.5 ± 12.8% | -6.2 ± 16.2% | -8.5 ± 16.1% | |
| DS-SS | 237.4 ± 91.0 | 236.6 ± 106.4 | 216.7 ± 90.9 | 213.6 ± 90.5 | |
| Relative change | - | +4.2 ± 45.1% | -5.6 ± 28.2% | -7.7 ± 25.1% |
RMS, root mean square; SS, static stretching; DS, dynamic stretching; SS-DS, static stretching followed by dynamic stretching; DS-SS, dynamic stretching followed by static stretching. Values are expressed as the mean ± standard deviation.
*p < 0.05 compared with the pre-stretching value.