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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Costa, Eduardo C. [1] ; Vieira, Caio M. A. [1] ; Moreira, Alexandre [2] ; Ugrinowitsch, Carlos [2] ; Castagna, Carlo [3] ; Aoki, Marcelo S. [4]
Total Authors: 6
Affiliation:
[1] Univ Fed Rio Grande do Norte, Dept Phys Educ, BR-59072970 Natal, RN - Brazil
[2] Univ Sao Paulo, Sch Phys Educ & Sport, Dept Sport, BR-05508 Sao Paulo - Brazil
[3] Italian Football Federat FIGC, Football Training & Biomech Lab, Tech Dept, Florence - Italy
[4] Univ Sao Paulo, Sch Arts Sci & Humanities, BR-05508 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF SPORTS SCIENCE AND MEDICINE; v. 12, n. 3, p. 559-564, SEP 2013.
Web of Science Citations: 20
Abstract

This study aimed to assess the external and internal loads of Brazilian soccer referees during official matches. A total of 11 field referees (aged 36.2 +/- 7.5 years) were monitored during 35 matches. The external (distance covered, mean and maximal speed) and internal load parameters (session ratings of perceived exertion {[}RPE] training load {[}TL], Edwards' TL, and time spent in different heart rate {[}HR] zones) were assessed in 3-4 matches per referee. External load parameters were measured using a wrist Global Positioning System (GPS) receiver. No differences in distance covered (5.219 +/- 205 vs. 5.230 +/- 237 m) and maximal speed (19.3 +/- 1.0 vs. 19.4 +/- 1.4 km.h(-1)) were observed between the halves of the matches (p > 0.05). However, the mean speed was higher in the first half of the matches (6.6 +/- 0.4 vs. 6.4 +/- 0.3 km.h(-1)) (p < 0.05) than in the second half. The mean HR during the matches was similar to 89% of HRmax. In similar to 95% of the matches, the referees demonstrated a HR >= 80% of HRmax. Nonetheless, the time spent at 90-100% of HRmax was higher in the first half (59.9 vs. 52.3%) (p < 0.05). Significant correlations between session RPE TL and distance covered at 90-100% of HRmax (r = 0.62) and session RPE TL and maximal speed (r = 0.54) (p < 0.05) were noted. Furthermore, there was a positive correlation between session RPE TL and Edwards' TL (r = 0.61) (p < 0.05). Brazilian soccer referees demonstrated high external and internal load demands during official matches. The portable GPS/HR monitors and session RPE method can provide relevant information regarding the magnitude of the physiological strain during official matches. (AU)

FAPESP's process: 12/20309-3 - Effect of biological maturation on sport talent identification process
Grantee:Marcelo Saldanha Aoki
Support Opportunities: Regular Research Grants