Surface | Muscles studied during bench press exercise | |||
---|---|---|---|---|
 | Rectus Abdominis | External Oblique | Internal Oblique | Erector Spinae |
Ball | 7.4 (6.3) | 5.7 (6.8) | 13.5 (9.2) | 6.06 (5.9) |
Bench | 4.7 (6.2) | 3.1 (2.8) | 8.2 (6.8) | 3.1 (1.6) |
Difference | 2.68 (6.49) | 2.52 (4.7) | 5.2 (6.26) | 2.93 (5.9) |
Increase | 4 | 3 | 4 | 3 |
Decrease | 2 | 0 | 0 | 0 |