Table 2 Mean (SD) normalised EMG levels during the post‐impact phase of the volley.
| Muscle* | Ball speed† | Ball type‡ | Side*†‡ | Muscle overall | |||||
|---|---|---|---|---|---|---|---|---|---|
| Slow | Medium | Fast | Penn Oversize | Wilson Rally | Regular | Forehand | Backhand | ||
| Flexor carpi radialis | 30.8 (21.6) | 31.7 (20.1) | 32.0 (18.5) | 31.3 (20.1) | 30.3 (20.0) | 32.8 (20.1) | 29.9 (20.6) | 33.1 (19.4) | 31.5§,¶,** (1.1) |
| Extensor carpi radialis | 50.4 (24.0) | 52.7 (27.0) | 58.6 (31.4) | 52.4 (24.8) | 53.6 (27.5) | 55.8 (30.9) | 59.8 (27.1) | 48.0 (27.3) | 53.9§,††,‡‡,§§ (4.0) |
| Triceps brachii | 27.5 (20.6) | 32.5 (25.7) | 33.6 (24.3) | 32.4 (26.0) | 30.0 (22.9) | 31.2 (22.4) | 32.8 (26.9) | 29.57 (20.1) | 31.2††,¶¶,# (2.0) |
| Antero‐middle deltoid | 37.4 (29.6) | 38.9 (29.6) | 35.6 (25.2) | 37.5 (28.0) | 35.2 (23.9) | 39.3 (32.0) | 40.1 (30.0) | 34.6 (26.0) | 37.3¶,‡‡,¶¶,$ (2.0) |
| Postero‐middle deltoid | 24.6 (25.2) | 26.0 (25.3) | 27.9 (25.8) | 25.0 (22.5) | 25.9 (23.3) | 27.7 (29.9) | 27.8 (28.9) | 24.5 (21.2) | 26.2**,§§,#,$ (1.4) |
| Average (SD) | 34.1 ^ (10.3) | 36.4 (10.2) | 37.5 ^ (12.1) | 35.7 (10.3) | 35.0 (10.9) | 37.4 (11.1) | 38.1& (13.0) | 34.0& (8.8) | |
*†‡Significant interaction between factors of the same symbol (p<0.05).
§,¶,**,††,‡‡,§§,¶¶,#,$, ^,&, Significant difference between levels of the same symbol (p<0.05).