Table 1.  Ground reaction force 20-trial mean and (standard deviation) values for all subjects.

Subject
Group

Subject
Number

Sex

Mass
(kg)

F1
(BW)

F2
(BW)

F1LR
(BW/s)

F2LR
(BW/s)

Impulse
(BW·s)

1

1

male

70.8

.78 (.09)

2.33 (.58)

54.88 (7.24)

54.40 (25.82)

.11 (.01)

2

male

70.9

1.94 (.12)

2.36 (.40)

128.50 (8.63)

37.50 (13.54)

.14 (.01)

3

female

62.9

1.96 (.21)

3.13 (.56)

139.30 (20.19)

64.33 (26.14)

.16 (.01)

4

male

77.8

1.18 (.13)

2.99 (.40)

82.01 (9.41)

68.11 (16.37)

.14 (.01)

5

male

100.8

.42 (.04)

1.22 (.15)

33.58(4.78)

38.05 (12.00)

.05 (.00)

2

6

male

58.6

1.14 (.13)

3.93 (.64)

105.80 (10.77)

151.01 (57.80)

.16 (.01)

7

male

75.0

.95 (.10)

2.92 (.34)

102.05 (13.42)

106.41 (35.19)

.14 (.01)

8

male

78.6

.99 (.13)

1.48 (.32)

55.36 (9.05)

15.37 (9.60)

.10 (.01)

9

male

77.3

1.12 (.09)

2.30 (.51)

86.89 (12.61)

49.83 (23.67)

.12 (.01)
 

10

male

63.2

1.20 (.09)

5.73 (.53)

112.14 (10.74)

237.99(47.70)

.20 (.02)
Notes: Subject Group 1 performed 0.61 m step-off landings; Group 2 performed 0.60 m drop landings. Units of BW represent multiples of body weight.