Monitoring External and Internal Loads of Brazilian Soccer Referees During Official Matches

Table 3. Mean and maximum HR (bmp), and time (min) spent in the HR zones during official matches. Data are means (±SD).

Variables	1^st half	2^nd half
Mean HR	166 (7)	165 (8)*
Maximum HR	184 (7)	184 (8)
HR zone 60-70%	.34 (.90) (.7%)	.22 (.47) (.5%)
HR zone 70-80%	2.00 (2.22) (4.1%)	3.28 (3.93) (6.8%)*
HR zone 80-90%	17.0 (9.0) (35.2%)	19.6 (8.3) (40.5%)*
HR zone 90-100%	28.9 (10.4) (59.9%)	25.3 (10.5) (52.3%)*

= significant difference between 1 and 2 half.