Table 2. Mean (sd) values obtain for the three different sprint start, initial position and values during the motion for football players and non-players and mean values of both groups (bottom line).
4 Points
3 Points
2 Points
US Football player
Non player
US Football player
Non player
US Football player
Non player
Initial Position
Head height (%)
39 (4)
44 (4)*
46 (5)
50 (7)
81 (8)
80 (10)
42 (5)
48 (6) †
81 (9) §‡
Trunk inclination (°)
103 (11)
98 (4)
106 (5)
100 (10)*
160 (13)
159 (16)
100 (8)
103 (9)
160 (15) §‡
Trunk head (°)
135 (26)
137 (15)
140 (16)
144 (14)
145 (6)
143 (11)
136 (20)
142 (15) †
144 (9)
Verticality (°)
122 (23)
125 (13)
114 (17)
117 (17)
55 (19)
58 (24)
123 (18)
115 (17) †
55 (21) §‡
FOV
.34 (.05)
.36 (.04)
.41 (.07)
.43 (.07)
1.58 (.40)
1.54 (.46)
.35 (.04)
.42 (.07) †
1.56 (0.43) §‡
Motion
Redress Time (s)
1.25 (.20)
1.18 (.20)
1.23 (.20)
1.18 (.10)
1.30 (.20)
1.33 (.20)
1.22 (.18)
1.22 (0.18)
1.32 (0.22)
Head Speed (m·s-1)
.90 (.13)
.85 (.08)
.80 (.15)
.77 (.11)
.27 (.14)
.27 (.15)
.87 (.11)
.78 (.13) †
.27 (.14) §‡
Body Speed (m·s-1)
2.70 (.37)
2.63 (.69)
2.59 (.59)
2.63 (.58)
2.21 (.47)
2.44 (.56)
2.67 (.55)
2.61 (0.56)
2.33 (.52) §‡
indicates difference between 3 and 2 points (at 0.05 level)
indicates difference between 4 and 2 points (at 0.05 level).
indicates difference between 4 and 3 points (at 0.05 level).
indicates difference between US football player and non-player (at 0.05 level).