Table 2. Physical demands on Brazilian soccer referees during official matches: 1 2 halves of matches.
Variables 1st half 2nd half
Distance covered (m) 5 219 (205) 5 230 (237)
Mean speed (km·h-1) 6.6 (.4) 6.4 (.3) *
Maximum speed (km·h-1) 19.3 (1.0) 19.4 (1.4)
= significant difference between 1 and 2 half.