Table 3.  20-trial mean and (standard deviation) of selected GRF variables for all test subjects jumping at 2.8 Hz jumping rate.

Subject #

Sex

Mass [kg]

T1 [s]

T2 [s]

T3 [s]

P [kN]

RFD [kN/s]

RFR [kN/s]

I [Ns]

1

male

87.5

87.5

.36 (.01)

.25 (.01)

.11 (.004)

2.63 (.06)

23.66 (1.21)

18.10 (.88)

2

male

97

97

.36 (.01)

.25 (.005)

.11 (.005)

2.98 (.06)

25.93 (1.05)

21.92 (1.03)

3

male

82

82

.36 (.01)

.23 (.01)

.10 (.004)

2.75 (.08)

27.25 (1.58)

20.67 (1.38)

4

female

63

63

.35 (.01)

.23 (.01)

.10 (.004)

2.06 (.06)

20.51 (1.30)

16.26 (1.63)

5

female

57.5

57.5

.36 (.01)

.24 (.01)

.11 (.01)

1.68 (.06)

14.76 (1.10)

12.75 (1.03)

6

female

52.5

52.5

.36 (.02)

.25 (.02)

.11 (.01)

1.65 (.09)

14.46 (1.78)

12.11 (1.55)

7

female

60

60

.36 (.01)

.23 (.01)

.10 (.01)

1.80 (.06)

17.37 (1.35)

14.13 (.88)

8

male

62

62

.36 (.01)

.25 (.01)

.11 (.01)

1.64 (.05)

14.45 (1.55)

12.00 (.62)

9

female

68.5

68.5

.36 (.01)

.25 (.02)

.12 (.01)

2.01 (.06)

16.97 (1.37)

14.71 (1.74)

10

female

58.5

58.5

.35 (.01)

.22 (.01)

.11 (.004)

1.93 (.04)

18.08 (0.74)

16.55 (.78)

11

male

60.5

60.5

.36 (.01)

.23 (.01)

.10 (.004)

2.29 (.06)

22.62 (1.33)

17.79 (1.75)

12

male

79

79

.35 (.01)

.25 (.01)

.11 (.004)

2.38 (.04)

20.93 (.74)

16.86 (.92)