Table 4. Percent changes in normalized EMG activity in trained chest-press exercise and barbell bench press.
All values are presented as mean ± standard derivation.
| Lifting phase | Training group | Exercise | Pectoralis major | Triceps brachii | Deltoid anterior | Biceps brachii |
|---|---|---|---|---|---|---|
| Pre-sticking region | SM¤ | Trained | 7.9 ± 69.2 | 5.2 ± 47.2 | -4.2 ± 32.0 | 2.2 ± 69.2 |
| SM | BBP | 14.1 ± 55.3 | 11.7 ± 39.0 | 8.3 ± 38.6 | 25.7 ± 106.7 | |
| SW¤ | Trained | 10.6 ± 43.2 | -13.1 ± 65.1 | -8.5 ± 22.1 | 14.1 ± 55.3 | |
| SW | BBP | 0.6 ± 80.5 | -9,0 ± 27.1 | 2.2 ± 35.1 | 5.4 ± 93.5 | |
| DB¤ | Trained | -11.9 ± 38.6 | -33.6 ± 38.5 # | -28.1 ± 27.1 | 17.3 ± 88.9 | |
| DB | BBP | 1.6 ± 45.0 | -18.0 ± 29.4 ** | 0.3 ± 0.1 | 15.3 ± 76.4 | |
| Sticking region | SM | Trained | 7.3 ± 68.4 | 12.2 ± 69.7 | 0.2 ± 37.0 | 15.1 ± 76.0 |
| SM | BBP | 9.2 ± 59.9 | 47.3 ± 101.4 | -2.3 ± 37.2 | 5.4 ± 91.0 | |
| SW | Trained | 10.6 ± 43.1 | -25.6 ± 42.1 | -8.6 ± 22.1 | 4.0 ± 55.7 | |
| SW | BBP | 18.5 ± 69.7 | -10.0 ± 30.1 | -8.2 ± 26.0 | 30.7 ± 88.3 | |
| DB | Trained | -18.5 ± 28.1 | -43.1 ± 27.2 | -28.1 ± 27.23 | -21.1 ± 48.5 | |
| DB | BBP | 17.4 ± 8.0 | 9.0 ± 63.4 | 25.6 ± 26.5 | 1.4 ± 45.6 | |
| Post-sticking region | SM | Trained | -19.90± 35.1 | -0.1 ± 37.9 | -1.4 ± 45.8 | 26.1 ± 89.2 |
| SM | BBP | 0.6 ± 41.1 | 15.4 ± 49.4 | -5.2 ± 25.7 | 26.1 ± 94.1 | |
| SW | Trained | -5.0 ± 51.3 | 1.5 ± 0.4 | -17.5 ± 39.5 | 32.7 ± 94.1 | |
| SW | BBP | 1.7 ± 44.5 | 3.6 ± 39.0 | -9.5 ± 34.2 | 35.0 ± 97.4 | |
| DB | Trained | -30.7 ± 20.6 | -47.2 ± 31.9 * | -24.7 ± 35.2 | -20.5 ± 44.1 | |
| DB | BBP | -0.1 ± 23.5 | 2.1 ± 1.1 | 28.4 ± 25.5 | -11.4 ± 41.9 |
*significant differences between pre- and post-tests (p < 0.05).
# significant differences between trained exercise and barbell bench press at pre-testing (p < 0.05).
** significant differences between trained exercise and barbell bench press at post-testing (p < 0.05). ¤SM = Smith machine, SW = Swiss ball, DB = Dumbbell and BBP = barbell bench press.