Table 1. Fitted parameter values of the projection variables and kicking mechanics variables for the two participants. Data are means (± standard error).
Variable
Fit parameter
Participant 1
Participant 2
symbol
units
(58 kicks)
(25 kicks)
Projection velocity
vmax
m·s-1
26.9 (.2)
24.2 (.2)
θ¸max
deg
50 (2)
41 (2)
A
(m·s-1)/deg2
.0017 (.0005)
.0021 (.0007)
r
.51
.57
Projection height
lleg
m
.62 (.03)
.57 (.05)
hmin
m
.37 (.01)
.28 (.02)
r
.94
.92
Ball spin rate
É·o
deg·s-1
-4.5 (.4)
-4.7 (5.7)
B1
rev·s-1
.04 (.06)
1.1 (4.9)
B2
/deg
.06 (.02)
.02 (.04)
r
.79
.61
Foot velocity
vmax
m·s-1
18.0 (.1)
16.4 (.2)
θ¸max
deg
44 (5)
46 (3)
A
(m·s-1)/deg2
.0007 (.0003)
.0013 (.0005)
r
.48
.49
Horizontal hip velocity
m
(m·s-1)/deg
-.022 (.004)
.002 (.012)
c
m·s-1
2.6 (.2)
2.0 (.5)
r
.56
.04
Thigh rotational ROM
m
deg/deg
.34 (.05)
.01 (.07)
c
deg
89 (2)
78 (3)
r
.71
.04
Shank angular velocity
m
(deg·s-1)/deg
1.4 (.6)
4.7 (1.2)
c
deg·s-1
1760 (30)
1400 (50)
r
.30
.04
Thigh angular velocity
m
(deg·s-1)/deg
-.4 (.8)
-1.1 (1.0)
c
deg·s-1
80 (50)
150 (40)
r
.06
.23
Knee angle
m
deg/deg
.13 (.03)
-.01 (.06)
c
deg
50 (2)
68 (3)
r
.47
.03
Max thigh angular velocity
m
(deg·s-1)/deg
-.1 (.9)
-.8 (1.4)
c
deg·s-1
1160 (50)
930 (60)
r
.02
.12
and are the gradient and -intercept of a linear fit to the data, and is the correlation coefficient.