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Table 3 Knee angles, absolute and integrated acceleration of the thigh muscles, and relative differences in EMG activation (means ± SD) during the first 30 s of the 3-min period in the downhill tuck position with vibration and different levels of compression

From: Is leg compression beneficial for alpine skiers?

  Compression [mmHg] 1stminute 2ndminute 3rdminute
In the downhill tuck position
Knee angle [°] 0 123.9 ± 10.6a,b 123.0 ± 13.3a,b 121.2 ± 14.1a,b
20 113.1 ± 8.3 113.0 ± 7.5 110.4 ± 9.2
40 111.6 ± 9.2 110.4 ± 11.1 109.5 ± 12.5
Acceleration [g] 0 0.89 ± 0.29 0.95 ± 0.44b 0.98 ± 0.33b
20 0.89 ± 0.37 0.85 ± 0.38 0.78 ± 0.41
40 0.84 ± 0.29 0.79 ± 0.24 0.73 ± 0.16
Integrated acceleration [g·s] 0 26.7 ± 8.6 28.3 ± 13.1a 29.2 ± 15.8a,b
20 26.7 ± 11.1 25.5 ± 11.3 23.1 ± 12.1
40 25.1 ± 8.6 23.7 ± 7.3 22.0 ± 4.8
EMG [% MVC] of the muscle     
Tibialis anterior 0 75.9 ± 38.03 67.9 ± 40.2a 89.3 ± 75.5a,b
20 69.4 ± 27.2 83.3 ± 71.5 125.6 ± 133.5
40 82.1 ± 27.5 100.8 ± 92.3 112.0 ± 55.9
Gastrocnemius medialis 0 92.7 ± 18.1 83.2 ± 16.1 90.3 ± 15.1b
20 95.9 ± 14.5 95.3 ± 24.3 95.0 ± 23.1
40 89.4 ± 19.4 96.2 ± 25.8 106.4 ± 29.3
Rectus femoris 0 106.7 ± 17.8 114.4 ± 22.9b 136.5 ± 39.4a,b
20 105.7 ± 23.9 120.6 ± 26.3 151.1 ± 43.6
40 107.5 ± 16.8 144.6 ± 64.0 178.8 ± 92.2
Vastus lateralis 0 99.8 ± 6.3 101.2 ± 9.62 118.7 ± 27.2
20 98.0 ± 4.2 103.7 ± 12.3 123.4 ± 23.4
40 100.0 ± 4.0 106.9 ± 15.8 125.2 ± 23.9
Vastus medialis 0 101.3 ± 17.6 89.7 ± 20.5 100.7 ± 26.3a,b
20 93.3 ± 5.8 96.7 ± 12.8 112.5 ± 26.6
40 95.3 ± 7.3 99.2 ± 11.9 116.2 ± 20.6
Biceps femoris 0 90.2 ± 19.7 82.9 ± 16.2 97.2 ± 21.4
20 89.3 ± 11.2 89.2 ± 19.1 104.3 ± 28.1
40 93.0 ± 14.8 92.2 ± 21.8 106.4 ± 33.9
Gluteus maximus 0 101.5 ± 16.0a,b 140.5 ± 80.2 165.8 ± 129.1a,b
20 111.6 ± 12.5 133.3 ± 43.7 134.0 ± 63.3
40 114.0 ± 22.8 132.7 ± 52.5 134.0 ± 133.0
  1. a P < 0.05 in comparison to the corresponding value with 20 mmHg.
  2. b P < 0.05 in comparison to the corresponding value with 40 mmHg.