Table 2.
Mean peak acceleration of 10 hits at the baseline and near exhaustion states. Values in parentheses represent one standard deviation. Units are g = 9.81 m/s2.
| Axis | Racquet |
Hand |
Forearm |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Baseline |
Near Exhaustion |
Baseline |
Near Exhaustion |
Baseline |
Near Exhaustion |
|||||||
| non-VDT | VDT | non-VDT | VDT | non-VDT | VDT | non-VDT | VDT | non-VDT | VDT | non-VDT | VDT | |
| X | 87.03 (17.07) | 72.93* (10.38) | 82.23 (46.31) | 75.97a (43.69) | 38.29 (14.21) | 39.92 (8.76) | 24.89 (7.57) | 31.33 (11.78) | 8.11 (1.86) | 7.99a (3.53) | 7.49 (2.02) | 8.00 (1.21) |
| Y | 276.75 (49.94) | 284.65 (36.70) | 251.18 (35.99) | 244.35 (26.29) | 41.58 (17.99) | 35.37 (11.69) | 24.68 (10.85) | 29.35 (8.26) | 10.35 (3.62) | 8.88 (3.51) | 9.78 (3.66) | 7.55a (6.00) |
| Z | 101.49 (13.23) | 96.86 (12.43) | 93.92 (11.58) | 98.12 (15.54) | 43.66 (16.54) | 41.59 (11.22) | 41.99 (24.09) | 37.06 (18.59) | 8.36a (2.51) | 7.65 (1.68) | 6.91a (7.91) | 7.24a (4.14) |
| Resultant | 272.93a (59.60) | 290.75 (33.82) | 261.99 (35.99) | 260.06 (23.16) | 61.88 (22.14) | 55.09 (13.13) | 41.53a (37.24) | 49.50 (19.44) | 12.63a (5.30) | 11.49a (4.61) | 12.67 (8.34) | 10.81a (2.62) |
Note. See Fig. 1B for orientation of the acceleration axes x, y, and z.
*significant difference after correcting for multiple comparison.
a
Median and interquartile range are reported for distributions significantly different from the normal distribution.