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Table 2 Cross tabulation of frequency of verified in-game impacts measured by the x-patchâ„¢, video-verified impacts, player position, and game time

From: Verifying Head Impacts Recorded by a Wearable Sensor using Video Footage in Rugby League: a Preliminary Study

 

Playing position

Player time in game (min)

Sensor-recorded in-game impacts

Video-verified game impacts

Percentage of impacts verified

Video-verified impacts per game hour

Video-verified direct impacts

Video-verified direct impacts per game hour

Player 1

Forward

365

29

29

100

4.8

15

2.5

 

Back

687

62

53

85.5

4.6

41

3.6

Player 2

Forward

259

63

62

98.4

14.3

27

6.3

Player 3

Back

1120

73

73

100

3.9

49

2.6

Player 4

Forward

568

182

180

98.9

19.0

155

16.4

Player 5

Back

808

126

105

83.3

7.8

85

6.3

Player 6

Forward

505

74

68

91.9

8.1

44

5.2

Player 7

Back

614

97

94

96.9

9.2

67

6.5

Player 8

Forward

420

73

68

93.2

9.7

53

7.6

Total

5346

779

732

94.0

8.2

536

6.0

  1. Season totals. Player 1 played in both forward and back positions during the season. Sensor-recorded impacts were ≥ 20gs