| Pre Mean ± SD | Post Mean ± SD | ESw | ESb | Magnitude of inference | ||
---|---|---|---|---|---|---|---|
Harmful | Trivial | Beneficial | |||||
Carry distance (m) | Â | Â | Â | 0.31 | 16% unlikely | 6% unlikely | 78% likely |
 IK | 197.2 ± 28.6 | 213.2 ± 34.4 | 0.59 |  | |||
 IT | 212.7 ± 24.8 | 220.4 ± 23.3 | 0.28 |  | |||
Ball speed (m/s) | Â | Â | Â | 0.21 | 4% very unlikely | 32% possible | 65% possible |
 IK | 63.4 ± 7.6 | 65.6 ± 6.6 | 0.32 |  | |||
 IT | 65.6 ± 6.7 | 66.3 ± 6.4 | 0.11 |  | |||
Club head speed (m/s) |  |  |  | −0.01 | 9% Unlikely | 84% Likely | 7% Unlikely |
 IK | 46.1 ± 4.4 | 46.9 ± 4.2 | 0.17 |  | |||
 IT | 46.8 ± 5.0 | 47.7 ± 4.4 | 0.18 |  |